space opera – Page 5 – One Thousand And One Parsecs

P is for Planets

Gliese 581 by ~arisechicken117 on deviantART

One of the best things about a good science fiction story is that it can take you to another world–literally! Well, not in the sense of actually physically taking you there, but if you want to experience the thrills of an alien world from the safety of your favorite chair, the best way to do it is to immerse yourself in a good space adventure story.

Planets are to science fiction what islands and continents are to fantasy. It’s possible to tell a story where no one ever sets foot on one, but then you’ve basically got a sea story (since space is an ocean, at least in most space opera). Even then, your characters are probably going to put into port from time to time, if for nothing else than a change of scenery to make things interesting. And if there’s anything science fiction interesting, it’s the wide variety of possible planet types.

For example, what would a planet be like if it were covered completely by water? If the world-ocean was so deep that there was no visible land? Assuming that the planet orbits within its sun’s habitable zone, where the temperature ranges allow water to exist as a liquid, then you would have a pretty interesting place. What would the hurricanes be like? A lot more intense than the ones here on Earth, that’s for sure.

Then again, suppose that the planet was a bit closer to its sun, and most of that water existed in the atmosphere as a gas. You’d have some pretty intense atmospheric pressures on the surface, but the density of the atmosphere would make it much easier to keep airships and flying castles aloft. In fact, that might be the most practical way to settle that kind of a world.

In our own solar system, there is an incredible amount of variety. On Mars, for example, glaciers of dry ice cover the southern pole, while the sun sets blue in a normally dirty brown sky. The tallest mountain actually summits above the atmosphere, and every few years, dust storms cover the whole world. And believe it or not, Mars is a lot more similar to Earth than anything else in our solar system.

On Titan, rivers of liquid methane flow down mountains of water ice, while black carbon dunes drift across a desert shrouded in orange haze. While the sun rises and sets with predictable regularity, the planet Saturn is suspended at the same point on the horizon and dominates a large portion of the sky. Don’t expect to see any rings, though–Titan orbits along Saturn’s ring plane, so the rings are mostly invisible.

Europa, one of the four Galilean moons of Jupiter, is also dominated by its host planet. Water ice covers the surface, but deep, deep below, there’s a massive liquid ocean that has never seen the light of the sun. What sort of monsters lurk in those depths–an ocean buried beneath a world?

Jupiter itself is pretty intense. A gas giant world with swirling bands of planet-sized clouds, it hosts a monstrous hurricane large enough to swallow at least two Earths. This vortex has been churning across the planet for over 150 years, and possibly as much as 350. I still remember the chills I got when I read 2001: A Space Odyssey, and the scientists’ probe dropped through the haze to a cloud deck as massive as one of our continents here on Earth.

Gas giant planets can be really interesting. They aren’t human habitable, since the gravity and pressure are so intense that anything man-made would be crushed before it could hit the surface, but those same forces can lead to some other interesting things. For example, at the lower levels, you may find storms that rain diamonds. Go further still, and you find an intense magnetic core that’s just on the verge of being able to sustain nuclear fusion. Detonate enough nuclear material down there, like they did in a short story from the Halo universe, and you can turn the planet into a star.

And that’s just our solar system. What about the hundreds of exoplanets that astronomers are now discovering? The first one to be confirmed, believe it or not, was orbiting of all things a pulsar! Imagine that–instead of the life-giving rays of a sun, the planet is bathed in highly lethal X-rays and gamma rays.

Of course, there are plenty of planets orbiting stars like our sun, but most of the ones discovered so far are hot Jupiters–gas giant worlds that orbit so close to their sun that the years are measured in hours. Some of these planets are so close that the sun is actually blasting the atmosphere away. We haven’t discovered the rocky core of a gas giant world that’s been destroyed in this manner, but theoretically it could exist.

Or what about the planets with highly elliptical orbits that traverse the habitable zone of their stars? Imagine: a world where the winters are so cold that the oceans freeze solid. After several of our Earth years, the spring brings a massive thaw. For a few short months the weather is actually quite balmy. Then, as spring turns to summer, the heat grows more and more intense, until the oceans begin to boil! When the summer reaches its zenith, the planet is nothing but a scorched desert wasteland. Soon, though, the autumn cool brings back the rains, with storms so intense that they refill the oceans in just a matter of months! Then, the deep freeze of winter begins, and the world returns to its long icy tomb.

One of my favorites, though, is the ribbon world that Asimov predicted in some of his stories. Worlds like this occur most commonly at class M red dwarf stars, which are so cool compared to our sun that planets within the habitable zone are tidally locked. This means that the sun neither rises nor sets, but remains stationary in the sky. The day side is burning hot, with either a barren desert wasteland or a giant hurricane large enough to cover most of the hemisphere. The night side, on the other hand, is so cold that all the water is completely frozen. The only habitable parts of the planet exist in a ribbon-like swath where the sun is just on the other side of the horizon, casting the land in perpetual twilight.

Believe it or not, we’ve actually discovered a planet like this in the Gliese system. Gliese 581g, or “Zarmina’s World” as the lead astronomer dubbed it, was discovered back in 2010. I was so excited by the discovery that I dedicated a blog post to it. Since then, the findings have not yet been confirmed, so it isn’t safe to call it a planet for sure, but if/when it ever is confirmed, it may be one of the first truly Earth-like planets to be discovered (at least, as Earth-like as a ribbon world can be).

In much of science fiction, there’s a tendency to make planets single biome only. Thus, you have your desert planets (Arrakis, Tatooine, Gunsmoke), your ice planets (Hoth, Gethen), your ocean planets (Calamari, Aqua), your jungle/forest planets (Dagobah, Lusitania, Kashyyyk), and even planets that are nothing but giant cities (Trantor, Coruscant). Some of the more recent series like Halo try to avert this, but even today it’s still fairly common.

If there’s anything that modern astronomy is showing us, though, it’s that the variety of planets and worlds out there is beyond anything we could possibly imagine. This is why I get a bit irked when an otherwise excellent series like Firefly makes out every planet to be like Wyoming. What about Gliese 581g? Kepler 22b? GJ 1214b? Kepler 16b?

As more exoplanets are discovered, I can’t help but believe that science fiction is going to experience a paradigm shift. What was once purely the realm of imagination is now being confirmed as reality. Alien worlds exist–alien Earths, even. And just as our conception of Mars changed from the Sword & Planet tales of Edgar Rice Burroughs’ Princess of Mars to the hard sf epics of Kim Stanley Robinson’s Red Mars, Green Mars, Blue Mars, so will our conception of other alien worlds.

I’ve got a lot of different planets in my own books, some borrowing a lot from the recent exoplanet discoveries, others leaning closer to the single biome worlds of classic space opera. In Desert Stars, Gaia Nova is kind of a cross between Arrakis and Trantor, with giant domed arcologies covering half the planet’s surface while the rest is mostly desert and wasteland. In Bringing Stella Home, Kardunash IV is (or rather, was) an Earth-like world, with forests, mountains, and oceans. In Stars of Blood and Glory, New Rigel is a straight up ocean world, while Ebitha from Star Wanderers is an ocean world tidally locked to its dwarf M class sun. I haven’t yet played with the elliptical planet, but I probably will someday.

One of the things I love most about a good science fiction story is that it takes me out of this world. With all the incredible new discoveries that astronomers are making, that aspect of the genre is only bound to get better. They’ve certainly enriched my own work, and will doubtless continue to do so in the future.

O is for Orbit

One of the key things that makes space different from Earth is that nothing is ever stationary. Anything close to our planet that isn’t moving at a good clip (measured in miles/kilometers per second) is liable to plummet like a brick. Gravity is still in effect, even though you’re in free fall and thus don’t really feel it.

The way to get around the falling problem is to orbit whatever celestial body you’re plummeting towards. When your tangential velocity gets high enough, gravity becomes your centripetal acceleration, and the system becomes rotational rather than discrete. In other words, you’re still falling, but you’re moving fast enough to cross the edge of the horizon before you hit.

Just to give you a scale of how fast you have to go to make this work, the International Space Station (ISS) is orbiting at about 230 miles (370 kilometers) above sea level, and it makes a complete rotation around the earth every 90 minutes. That means that the good folks who live and work up there see about 16 sunrises and sunsets per day.

If you’ve spent your whole life living planetside, orbital mechanics can be a bit difficult to grasp. Here are just a few of the basics:

Since orbit is basically free fall, you don’t need to fire your engines to stay aloft. In fact, once you’re parked in a stable orbit, you can stay there almost indefinitely. This is how satellites work: we use a rocket to put them in position, but once they’re there all they need is a minor adjustment from time to time. The moon is basically a giant natural satellite, and it doesn’t need any sort of thrust to stay aloft.

As objects fall closer to the body they’re orbiting, they orbit faster. Just think about how figure skaters speed up when they pull their arms in closer to their bodies. The main reason for this is that the object has a much shorter distance to travel to make a complete revolution. To understand how this works, take a CD and measure the inside edge versus the outside edge.

However, since your tangential velocity is proportional to your centripetal acceleration (ie gravity), the way to jump to a higher orbit is to speed up. Conversely, the way to fall to a lower orbit is to slow down. An object’s angular momentum (mass X tangential velocity) is proportional to the distance of the object from the rotational system’s center of mass, so changing the object’s velocity will also change its distance from the center.

So if you’re in a spaceship and you’re about to collide with an object on a parallel orbit, the way to avoid it is not to nose your ship up like an airplane. Instead, fire your engines and try to go faster (or slower, as the case may be). It’s a bit counter-intuitive, but your altitude will change accordingly. The anime/manga series Planetes really got this right.

However, even though you’re moving faster at a higher orbit, you have a lot more distance to travel, so it actually takes longer to make a complete orbit. If you go high enough, you can eventually get to the point where the orbital period equals the rotational period of the celestial body you’re orbiting. We call this a geosynchronous orbit. If you’re orbiting around the celestial body’s equator, then to a person on the surface, it appears as if you’re stationary. You’re not, of course–nothing in space really is–but both you and the person on the planet’s surface are moving in tandem, so that’s how it appears.

Ever wonder why satellite dishes all point in the same direction? This is why. The signal comes from a satellite in geostationary orbit, where it doesn’t move relative to the people on the surface. Thus, if you know where to point your dish, you will always get a signal since the satellite doesn’t appear to move.

An orbit doesn’t have to be circular, but the barycenter (ie the center of mass for the whole system, where the mass of both objects cancels each other out) has to be at one of the focal points of an ellipse. This is how comets work. An object in an elliptical orbit will speed up when it gets closer to the object it’s orbiting, and slow down when it gets further away.

It’s possible–indeed, quite common–to orbit two celestial bodies simultaneously. For example, since the Earth orbits the sun, anything orbiting the Earth must also orbit the sun at the same time. If you’re close enough to the Earth, this doesn’t really matter since the Earth exerts a much more immediate force. But when you get further away, interesting things start to happen.

A Lagrangian point is a point of gravitational balance between two orbiting celestial bodies of unequal mass. Basically, they’re points of equilibrium where objects appear to remain stationary, so long as they continue to orbit in tandem with the other two celestial bodies.

In science fiction, these are great places to put space stations and other orbital settlements, since they appear as fixed points relative to the planet or moon that they’re moving around. In real life, asteroids tend to clump around these points in a planet’s orbit, especially the L5 and L4 points. Jupiter has so many of them that we call them the Trojans and the Greeks.

Since orbital mechanics can be a bit difficult to grasp, a lot of science fiction gets it wrong, especially space opera. For a recent example, just look at the Halo series–unless those Covenant ships have some sort of magical drive, there’s no way they could hover above the surfaces of planets the way they do. Orbiting does NOT equal hovering. And in Halo: Reach, where Jorge knocks out the main ship for the Covenant advance force … yeah, if a ship that large actually fell from orbit into the surface of a planet, it would be moving fast enough to make a crater the size of a small continent, kicking up enough dust and debris to cause a mass extinction event like the one that killed the Dinosaurs.

At the same time, when a science fiction story goes the length to get the orbital mechanics right, it can add a surprising amount of realism. A good example of this is Passage at Arms by Glen Cook. I loved how he depicted the orbital siege of the main colony world, with the way the orbital space battles looked like from the planet’s surface. The human forces were able to keep a toehold on space due to a low orbiting asteroid that the aliens couldn’t get to without exposing their forces to attack, and that served as the staging ground for the main characters to fight back.

For hard sci-fi, orbital mechanics is absolutely essential–you’ll be tarred and feathered if you get any of it wrong. For soft sci-fi like space opera, it’s not essential, but it adds a lot to the story if you can get it right. In any magic system, the limitations are what make it interesting. If you’re writing science fiction, then physics is your magic system, so knowing how it works can really add a lot to your story.

For example, in the recent Schlock Mercenary storyline, the characters board a spaceship with an artificial gravity generator centered around a large cylindrical pylon that runs the length of the ship. One of the implications of having Earth-strength gravity around such a small object is that you can actually throw a baseball into orbit. And that’s just the beginning! Needless to say, I’m really interested to see where Howard Tayler takes this story in the weeks and months to come.

Even though I write more space opera / science fantasy type stuff, I do the best I can to get my orbital dynamics right. You can see this in the space battles in Stars of Blood and Glory and Bringing Stella Home, as well as the setting elements in Desert Stars. When the desert tribesmen look up at the night sky, they gaze at the stars and satellites–hundreds of satellites, many of them starships bound for distant spaceports on the more civilized side of the world. One of the reviewers said that the world felt so real it was almost like he could reach out and touch it, so I guess I did something right. I’ll definitely keep it up in the future.

M is for Merchanter

If space is an ocean and interstellar colonization is happening on a grand scale, then it should come as no surprise that so many starship captains are intrepid merchants, traveling the galaxy in pursuit of a good business deal. Whether they’re doing it legally as entrepreneurs or illegally as smugglers, you can find these guys in almost any space opera, from Star Wars and Star Trek to Firefly and Foundation.

Ever since Marco Polo and Sindbad the Sailor, intrepid merchants have played a major role throughout history. The brave adventurers who travels to exotic locales to bring you all the best deals, these are often the guys at the forefront of exploration and expansion. After all, Columbus sailed the ocean blue to find a better trade route to India–discovering a new world was just a side benefit. The British Empire had its origins in mercantilism, forming the empire to protect their trade routes (and later, to secure markets and resources for their industrialized economy).

Unlike their real-world counterparts, however, space merchanters have a lot more challenges to contend with than sandstorms and bandits. Science fictional universes are teeming with all sorts of exotic dangers, from black holes and solar flares to space pirates and strange alien races. Unless FTL communication is in force, the immensity of space often makes it impossible to know exactly what to expect on your next FTL jump. And then there’s all the normal space stuff, like busted airlocks and critical failures in the oxygen recyclers.

The best stories, though, are the ones that world build their merchanters to the point where they form their own distinct society. This may overlap with the proud merchant race, though IMO it works best when it’s more than just a hat that everyone wears. The merchanters from C.J. Cherryh’s Alliance-Union universe are a great example, where the entire society has restructured itself around the nomadic spacefaring lifestyle. Another is Heinlein’s Citizen of the Galaxy, where the free traders have developed a strict social hierarchy that defines everyone’s role in running the spaceships.

Since space-centered science fiction largely grew up in the Cold War era, I wonder how much of this trope stems out of the clash between communism and capitalism. The original Star Trek certainly shows a lot of Cold War influences, with the Klingons originally playing proxy for the Russians. Is the genre’s fascination with the adventurous space merchant somehow an outgrowth of that world-shaping conflict? And if so, how do the stories differ on the Soviet side? It makes me wish I could read Russian, since the Soviets certainly had their own fascination with science fiction and space opera.

In my own work, this trope plays a central role. Most of the major characters in my stories are merchants of one stripe or another. James McCoy from Bringing Stella Home is the son of a merchanter, and comes from a mining colony where interplanetary trade drives the local economy (setting up the conflict for Heart of the Nebula after the Hameji take over).

But the trope takes special prominence in my Star Wanderers novellas, which was largely a reaction to C.J. Cherryh and Heinlein. I wanted to create a spacefaring society on the starbound frontier that revolved not only around trade and colonization, but much more personal struggles like finding love and fighting loneliness. In that sense, the stories are a lot more like Merchanter’s Luck than Downbelow Station–more about the lives of individual characters than the grand sweep of galactic history.

Either way, I’m a big fan of this trope. If you’ve got any examples from your favorite books, please share! Wish-fulfillment is a huge part of any fictional genre, and science fiction is no exception. If I could leave it all behind to become a merchant to the stars, you can bet I’d do it in an instant!

I is for Interstellar

Right after I went through my Dinosaur phase, I saw Star Wars IV: A New Hope for the first time. Instantly, all that childlike excitement and exuberance was transferred from paleontology to astronomy. We had a series of about twenty astronomy books in my elementary school’s LRC (Asimov’s astronomy series, I believe–the ones with the gray dust jackets), and in about a year I’d read them all.

Star Wars was fun, but what was really fascinating was learning about the stars. When I started to grasp the scale of our galaxy–that if our solar system was the size of a milk carton, the Milky Way would be the size of North America–my mind was totally blown. Quasars, pulsars, black holes, white dwarfs, red giants–it was so amazing! And then, when I started thinking about all the other worlds out there, and what it would be like to visit them–that’s when I became a science fiction fan for life.

It goes without saying that you can’t have space opera without setting the story somewhere in space. But the best space opera goes much further than that–it’s about space as the final frontier, and humanity’s ultimate destiny among the stars. After all, if we as a species stay put on this pale blue dot, sooner or later we’ll kill ourselves off or suffer another mass extinction event that wipes us all out like the Dinosaurs.

For that reason, classic space opera often takes undertones of manifest destiny, except on a galactic scale. The stars are not just interesting places to visit, they’re absolutely crucial to our survival, and no matter what alien dangers await us, we will face them boldly and either conquer or be conquered.

Of course, not all space opera stories take place during the exploration and colonization phase of human interstellar expansion. Plenty of stories take place thousands of years later, once humanity has comfortably established itself among the stars. Even so, there are still more than enough wonders remaining to be explored–if not for the characters, then for the readership. The vastness of space is so great that there really is no end to it, and the possibilities are only bounded by the writer’s imagination.

One of my favorite space opera computer games is Star Control II, also know as the Ur-Quan Masters. In the game, you’re the captain of a giant starship built with alien precursor technology. The races of the Federation, including humanity, have been defeated and enslaved by an aggressive warrior race known as the Ur-Quan. You must travel from star to star, gathering resources to upgrade your starship and convincing the other alien races to join the new alliance.

By far, the best part about that game is the starmap. It’s HUGE! More worlds than anyone can possibly visit in any one playthrough, or five, or even ten. And each alien race has its own history, its own culture, its own set of goals and objectives–and oftentimes, most of these goals have very little to do with the actual conflict of the game. In fact, there are some races like the Arilou which don’t even seem to know that there’s a war going on. They’re much more interested in something frightening and mysterious from another dimension that they never quite explained, but that may involve the Orz somehow…

With each new world that you discover, you learn that the galaxy has a very, very, very long history. So long, in fact, that the human race has only really existed for a blip in time. The other races are involved in their own disputes, and many of these go back to the times when our ancestors were swinging through the trees somewhere in central Africa. But whether or not we want to be a part of it, we’re involved, simply by virtue of where our star happens to be located.

The best space opera isn’t just about our world: it’s about our place in a much wider universe. Whether it’s a serious tale about humanity’s ultimate destiny, or an action-packed intergalactic romp, there’s always that sense of something greater than us–that same sense of wonder that gripped me as a boy when I first started to learn about the stars.

Image by nyrath at Project Rho. I highly recommend checking out his excellent starmaps!

H is for Hologram

In real life, the term “hologram” means something fairly specific. But in science fiction, it can mean a number of different things.

For example, in Star Wars it’s basically a three dimensional video recording projected on a flat surface. In Halo, it’s the visual form that the AI character Cortana takes when she wants to interact with the Master Chief. And in Star Trek, the holograms actually have a degree of physical substance, so that in some episodes they go rogue and try to take over the ship.

The basic underlying idea, though, is the same: blurring the line between the virtual world and the real world through a virtual projection that we can interact with. And in that sense, this is actually an area where science fact is fast catching up with science fiction.

Some sub-genres, such as cyberpunk, focus almost solely on the tension between the real and the virtual. Often set in a near-future world, cyberpunk stories often feature a crapsack future, from which the only meaningful escape is a virtual reality. But the thing about virtual realities is that they can be reprogrammed in such a way as to give the ones controlling it almost absolute power over the lives of the people inside. For that reason, the main characters are often hackers, struggling against the corporate evil overlords.

But holograms aren’t restricted to cyberpunk. They’re quite common in space opera, too, and not just because they’re cool. For one thing, they can be really useful for training simulations (which often leads to holodeck malfunctions, courtesy of the rule of drama). They can also be useful as disguises or decoys, especially in the Halo series.

But perhaps the most memorable holograms are the ones who develop a close relationship with their real-world human counterparts. This may include romance, which, combined with the existential angst that typically surrounds androids, robots, and cyborgs, makes for some very interesting tension. A good example of this is Cortana from the Halo series, an alien AI who took on a younger form of her human handler, Doctor Halsey, and then developed a very close relationship with her Spartan bodyguard, the Master Chief. It never actually went anywhere (at least in the main series arc), but it certainly made for an interesting story.

Jane from the Ender’s Game series would probably be my favorite hologram, though she’s more of a shapeshifting AI who can take many different forms, depending on what suits her. Cortana is definitely up there too. I haven’t used this trope much in my own fiction yet, but I’m playing with it in Heart of the Nebula, a currently unpublished direct sequel to Bringing Stella Home. Not sure exactly where I want to take it yet, but it should be interesting.

G is for Gravity

cmdr_hadfield_juggling — Commander Hadfield planning a zero-g easter egg hunt earlier this month on the ISS.

Possibly one of the most defining aspects of space is the sensation of free fall. Of course, gravity exists in space, the same as it does everywhere else in the universe (probably), but in space we feel its effects differently because we aren’t close enough to a body of sufficient mass to feel a strong pull. That, and our spaceship itself is also in free fall, so if that’s our frame of reference we feel no weight because there’s nothing for weight to push back on … but that’s a concept probably best left for O is for Orbit.

The thing is, as fun as weightlessness can be, in the long-term it can have some negative health effects, such as deterioration of bone and muscles, weakening of the immune system, etc. The effects of micro gravity on human fertility are not very well-studied, but there’s some speculation that conception and gestation would be impossible, since embryos need gravity in order to implant properly. Humans are adapted to live on the surface of Earth, and that means living with a constant 10 m/s² or so of gravitational acceleration.

For future space colonies and spacefaring civilizations, this means we need to find a way to simulate the effects of gravity in a micro-gravity environment. There are a few common ways to deal with this problem:

Artificial Gravity — Applied phlebotinum that creates a field within which the gravity is normal. A necessary weasel hand wave that you’ll see most often in soft sci-fi and space opera, where the plot and characters are more important than the science.
Centrifugal Gravity — The illusion of gravity created by spinning a can-like spaceship or space station in a circle, pressing the humans against the inside wall. You’ll see this in both hard and soft sci-fi. Scale it up, and you get Ringworld Planets.
Powerful Starship Drive — If your starship drive is powerful enough, it can accelerate you at 10 m/s², effectively creating the sensation of gravity. Your starship will be like a flying skyscraper, where “down” is in the direction of the engines. At this rate of acceleration, you should reach 99.9% the speed of light in about a year, which opens up all sorts of possibilities for relativistic space travel (provided you have a sufficiently massive energy source to sustain that reaction). Just be sure to give yourself the same amount of time to decelerate, otherwise bad things may happen.
Baby Planet — An asteroid no larger than a small asteroid that still, for some reason, has normal Earth-like gravity. Think Le Petit Prince. Not nearly as common as the other three, but the existence of gravitational waves means that it may be possible (or at least plausible) to create gravity generators that work this way.
Roll with it — Yeah, so everything is weightless in space. So what? Deal.

Another problem related to gravity is rapid deceleration. Unless you don’t mind splattering everyone in your starship all over the walls and ceilings, you can’t go from zero to near-light speeds (or vice versa) without some way to counteract the sharp change in momentum. Space opera and soft sci-fi gets around this by using inertial dampers–basically, magical devices that give the starship a nice, soft ride (unless you want the bridge to explode, of course). As you might expect, stories on the harder side of sci-fi tend to play around with this a lot more.

My first exposure to artificial gravity came when I read a comic book version of The Norby Chronicles by Isaac Asimov. The characters had a device that would basically allow them to levitate, and I thought that was so cool. It wasn’t until I read the Corellia Trilogy by Roger Allen McBride that I realized that every starship in the Star Wars universe had a machine that could manipulate gravity like this. At one point, the artificial gravity generators on one of the ships failed. My mind was blown, and I’ve never looked at gravity the same since.

I tend to write stories where the characters and plot are more central than the science, so I’ll often just fall back on the standard artificial gravity field like most space opera. During combat maneuvers, though, things get a bit more tricky, with dampers on the bridge that mitigate (but don’t erase) the worst effects of rapid deceleration, and special coffin-like chambers for the crew below decks to keep them from getting splattered. In my Star Wanderers series, I also use centrifugal gravity for the larger space stations, since I figure the energy costs of artificial gravity tend to scale up.

In short, science fiction stories that address the problem of gravity in a real and thoughtful way tend to be a lot more believable and immersive, even if the solution to the problem is basically magic. As with anything in science fiction, there are so many imaginative ways of dealing with the problem that it’s actually more of an opportunity than anything else.

F is for Faster Than Light

Remember that moment in Star Wars when the Millennium Falcon went into hyperspace? When Harrison Ford shouted “go strap yourselves in, I’m going to make the jump to light speed,” and the sky lit up as the stars streaked by? That was my first introduction to faster-than-light (FTL) travel, and I haven’t looked back since.

FTL is a major recurring trope in space opera, and not just because of how cool it is. If you’re going to have a galactic empire, you need some way to get around that empire–or at least some way to transmit information without too much difficulty. The distance between star systems is measured not in miles or kilometers, but light years–that is, the distance that a particle of light can travel in one year. Considering how the nearest star to Earth, Proxima Centauri, is ~4.24 ly away, you can see the need for some sort of magical technology to bridge the distance.

FTL travel comes in four basic flavors:

Warp Drives — The ship breaks the speed of light as easily as our modern fighter jets break the speed of sound. Impossible to justify, except through hand-waving. The most prominent example of this is Star Trek.
Jump Drives — The ship disappears from its current position and reappears somewhere else. Also requires hand-waving, but is at least a little easier to justify. Battlestar Galactica is a good example of this, as is Schlock Mercenary.
Hyperspace Drives — The ship enters an alternate dimension which allows it to travel faster through our own. The alternate dimension is called ____space, usually “hyper” but also “quasi,” “x,” etc. Star Wars is the classic example, though Star Control II took things a step further by having a hyperspace dimension within hyperspace.
Wormgate Network — The ship (or maybe just the passengers) enters a portal which transports it to a portal somewhere else. A network of these portals allows travel throughout the galaxy. Stargate and Babylon 5 use this method.

An alternate way to do it is to make FTL travel impossible, but hold the galactic empire together through FTL communication. This technology, known as the ansible, features prominently in Ursula K. Le Guin’s books and the Ender’s Game universe. It has some really interesting implications: for example, even though planets can communicate instantaneously with each other, it takes almost 40 or 50 years to go from one to another, but at near-light speeds, it feels as if only a few months have gone by. Thus, if you’re going to travel to another world, you have to leave everything behind, including your family and loved ones. By traveling from world to world, you can skip entire generations, spreading your natural lifespan across thousands of years of normal time.

In writing FTL, one thing you have to be really careful about is to keep in mind ways in which the system can be abused. For example, if jump drive technology makes it possible to instantaneously transport anything anywhere in the universe, then you can bet that someone is going to send a bomb into the White House (or whatever the equivalent is in your fictional universe). Thus, the invention of unrestricted jump drive technology will lead to a very short and brutal war.

This actually happened in Schlock Mercenary, and the solution was Terraport Area Denial (TAD) zones, or broad areas of space where a force field prevents anyone from either jumping in or out. Thus, anyone who wants to visit a planet in a TAD zone has to jump to the edge of the field and travel the rest of the way at sublight speeds.

FTL isn’t always appropriate for a science fiction story. If the story is supposed to lean more toward hard sf, then it’s probably better to stick with our current understanding of the rules of physics, which state that nothing can travel faster than the speed of light. Still, with things like quantum entanglement and other recent discoveries, if you know the science well enough, even the speed of light might not be an upper limit. But for the rest of us mortals, FTL is basically just magic–a sufficiently explained magic, perhaps, but magic nonetheless.

Personally, I’m a fan of the jump drive form of FTL. That’s the one I use the most in my own books. The cost is that the further distance you try to jump, the harder it is to pinpoint exactly where you’ll end up. To overcome this, you can use jump beacons to draw out anyone trying to jump into your particular sector and have them exit jumpspace next to the beacon. This comes in handy in combat, when the enemy tries to jump a nuke onto your ship.

In the later Gaia Nova books, FTL is facilitated by jump stations spread out in a line across space, with reactors powerful enough to jump ships rapidly to the next point along the line. In the earlier Star Wanderers books, that technology hasn’t been invented yet, so there’s still an Outworld frontier.

It gets kind of complicated, but it’s lots and lots of fun to world build. For example, how does a particular change in the FTL tech alter the galactic balance of power? When settlers try to colonize a new system, what do they establish first–starlanes, jump beacons, Lagrange outposts, or what? As with any magic, changing one thing affects everything else, which also affects everything else, which … yeah, you get the picture.

E is for Empire

Almost every far future science fiction story has a galactic empire of some kind. From Dune to Foundation, from Star Wars to Firefly, there’s always someone trying to rule the galaxy, often in a way that makes life difficult for the protagonists.

Why? Rule of drama, of course, but also because it gives the story a truly epic scope. Just as the classics such as Homer’s Iliad and Tolstoy’s War and Peace are as much about entire civilizations as they are about the people characters within them, so it is with science fiction, especially space opera. Combine that with science fiction’s forward-thinking nature, and you have the potential for some truly amazing stories about humanity’s destiny among the stars.

But why empire? Because even if we make it out to the stars, we’ll probably still take with us all of the baggage that makes us human. Science fiction may be forward looking, but history repeats itself, and you can’t have a clear view of the future without understanding and acknowledging the past.

Not all galactic empires are evil, but most of them are. We shouldn’t have to look further than the real-world history of Imperialism to see why. Oppression, exploitation, slavery, genocide–all of these have been done in the name of Empire, and many more evils besides. Even benevolent hegemonic powers (such as, I would argue, the United States of America) often end up doing great harm, either through action or inaction.

Of course, all of this makes for some really great stories. When Asimov wrote his Foundation series, he quite literally based it on The History of the Decline and Fall of the Roman Empire by Edward Gibbon. When Frank Herbert wrote Dune, he drew extensively from his background as an orientalist and based the overworld story on the Muslim conquests of the 7th and 8th centuries. Star Wars is based loosely on the collapse of the Roman Republic, and Firefly echoes many of the old Western tales of former Confederate soldiers heading west after the US Civil War.

It’s worth pointing out that the Galactic Empire is by no means the only form of political organization in space opera. There are actually several, including:

The Federation — A loose organization of stars and planets that usually exists to foster cooperation and mutual peace between galactic civilizations. Rarely evil, but can be crippled by red tape.
The Republic — A more centralized version of the Federation, typically. Exercises more control over its citizens, but not in an oppressive way. Usually features some form of representative government.
The Alliance — A team of political underdogs united to overthrow the Empire and establish a more just form of government in its place. If they win, they usually become the Republic or the Federation.
The Kingdom — A smaller government within the larger political system, often struggling for survival against more powerful forces. Not always democratic, but is often good, at least to its own citizens.
The Hegemonic Empire — Like the Empire, but rules primarily through soft power, ie co-opting their enemies rather than crushing them. May overlap with the Republic or the Federation.
The People’s Republic of Tyranny — The Empire pretending to be the Federation.
The Vestigial Empire — What the Empire becomes when it’s been defeated but not yet destroyed. Still oppressive and evil, but rules a smaller territory and struggles for relevance and survival.
The Remnant — An element from the Alliance that’s gone rogue. The war may be over, but these guys are still fighting it, even if they’ve lost sight of what they’re fighting for.
The Horde — A highly aggressive and expansionist warlord state. By far the most violent and brutal of any political organization, it seeks to conquer and subjugate the entire galaxy.

As a political science major, all these forms of government really fascinate me. I’ve played with quite a few of them, especially the Horde (Bringing Stella Home), the Empire (Desert Stars), the Hegemonic Empire (Star Wanderers), the Kingdom (Stars of Blood and Glory), and the Remnant (also Stars of Blood and Glory). You can definitely expect to see me play with them again in the future.

C is for Cryo

I think every science fiction writer has a cryo (aka “human popsicle“) story sitting around somewhere, even if it’s just in the back of their head. It’s one of those tropes that keeps coming back, just like the alien invasion, the robot apocalypse, and the Adam and Eve plot.

The basic concept is pretty simple, even if the technology is a bit more complex: a human or animal undergoes rapid freezing in order to put themselves into stasis for an extended period of time. Months, years, or even centuries later, someone thaws and resuscitates them so that they wake up in a completely different time and place.

There are a lot of good reasons why going into cryo makes sense in a science fiction universe. One of the more common ones is that the characters are colonists on a mission to an alien star, and their spaceship doesn’t have a faster-than-light drive. Rather than go through all the trouble of building a generation ship, the designers instead built a series of cryo chambers to put the colonists into stasis for an extended period of time. It might take centuries or millennia for the ship to reach its destination, but when it does, the colonists wake up as if it’s just been a long, dreamless night.

In The Worthing Saga, Orson Scott Card has a somewhat unusual rationale behind the prevalence of cryo in his universe (though they call it “hot sleep,” and it’s induced by a drug called soma). Only the rich can afford the technology, and the imperial overlords very carefully regulate the use of it so that there’s a clear hierarchy based on who goes under for the longest amount at a time. It’s a way for the citizens to achieve a simulated form of immortality, by skipping five or ten years every year or two of their lives.

In the Halo video game series, the UNSC uses cryo as a way to preserve their greatest military assets, the Spartans, for the times when they’re needed. The first game in the series starts when John-117, aka the Master Chief, is awakened just as the starship Pillar of Autumn crash lands on a mysterious alien structure. Like something from an old Norse legend, the third game ends when the Master Chief seals himself into the cryo chamber of a derelict starship, telling the AI Cortana “wake me when you need me.” (highlight to view spoilers).

So why are cryo stories so prevalent in science fiction? For one thing, they’ve been floating around in our cultural subconscious a lot longer than the genre has been in existence–just think of Sleeping Beauty or Rip Van Winkle. For another thing, the science is not that far-fetched. Certain animals can be revived after extended periods of frozen stasis, and according to the New York Times, it’s happened at least once with a human being. Science fiction has a long history of turning fiction into fact (for example, Arthur C. Clarke and communication satellites), so perhaps it’s only a matter of time before human cryotech becomes a reality.

I’m definitely a fan of this trope in my own writing. Genesis Earth has a chapter with a rather horrific cryothaw scene, which I later spun off into a short piece titled “From the Ice Incarnate.” I haven’t played with it much in my latest books, but in Heart of the Nebula which I hope to publish later this year, the cryotech plays a very important role in the plot. And if I ever write a prequel to my Gaia Nova series showing how that universe got started, it will feature a cryo colonization story. The main premise of that series is that a group of human colonists fled 21st century Earth and went into cryo to colonize a distant corner of the galaxy, but when they woke up, they couldn’t find Earth anymore, so it became something of an ancient holy legend (which is a major driver for Desert Stars).

B is for Space Battles

osc_first_meetings If you fell in love with science fiction when you were twelve, chances were it was because of the awesome space battles. That was certainly the case with me. When I saw Star Wars for the first time, I spent hours running around the house pretending I was flying my own starfighter. In some ways, I’ve never really stopped. 😛

Ever since space opera became its own subgenre, space warfare has featured prominently in it, probably for the same reasons that Homer and Tolstoy framed their sprawling epics with a tale of war. Where else are you going to find enough drama to fill volumes? The fact that it’s set in space makes it so much cooler.

There are a lot of things about the space setting that make war stories different from those set here on Earth. For one thing, there’s a huge element of exploration and unknown. Even before we took the first photographs of Earth from space, there pretty much isn’t any corner on this planet that hasn’t been discovered by somebody. In space, though, it’s still possible to stumble on a hidden planet, or find a mysterious alien artifact that can turn the tide of the war (Halo, anyone?).

For another thing, the dynamics of battle are completely different. Sure, some stories treat space like an ocean, and there’s certainly a place for that kind of story, but the more interesting ones (at least to me) take into account all the profound differences. For one thing, the zero gravity means that there is no “up” or “down,” which means that you have to deal with the possibility of attack coming from any direction, not just along a horizontal plane. That concept alone drives the battles in Orson Scott Card’s Ender’s Game series, where “the enemy’s gate is down.”

One thing that really tickles me is when the story takes things a step further and incorporates things like orbital mechanics and delta-v. I haven’t seen many books or games that do this, but the ones that do have really engrossed me by making the world feel that much more real. Glen Cook did it in Passage At Arms, and the new Battlestar Galactica did it in the viper dogfights (though I’m not sure if they did it on the ship-to-ship scale).

The implications of real-world space physics on warfare are quite fascinating. Rocketpunk Manifesto is an excellent blog that’s almost entirely dedicated to exploring them all, with all sorts of fascinating discussions on what the “plausible mid-future” may look like. But even if all you’re looking for is an entertaining romp through space, the story telling possibilities are so much greater when you take the constraints of physics into account.

For example, if it takes months or even years to travel between planets, and orbital trajectories are fairly straightforward to figure out, how does it affect things if you can see the enemy fleet coming at your planet that long in advance? If escape velocity from a gravity well like Earth is so difficult to achieve, what does that mean about the possibility of long-term planetary sieges? And if starships are so far apart and moving so fast as to make full-on broadsides unlikely, how does that shape the battle tactics and strategy? In spite of the physical constraints (or indeed, perhaps because of them), the possibilities are endless.

Man, I love me some good space battles. One of my recent sci-fi favorites that features some epic battles is Wolfhound by my friend Kindal Debenham. In my own work, you’ll find lots of them, especially in the Gaia Nova series (Bringing Stella Home, Stars of Blood and Glory, and to a lesser extent Desert Stars). They say that the golden age for science fiction is about twelve years old, and that’s definitely true for me. Expect to see lots more space battles from me in the future.