Some friends and I started a thread on another website about "What Separates Hard Science-Fiction From Space Opera?"
"Hard" SF adheres to the known laws of physics, and merely extrapolates on what we already know. SF "softens" when one progressively adds gimmicks or plot devices that violate one or more physical laws, thereby becoming "Space Opera."
So, here is a short list of what I think constitutes Hard Science Fiction, based on the question, "Keeping in mind our currently know physical laws, and extrapolating thereon as needed, what might we expect to find when humanity finally reaches the stars?"
· Alien races would be either "Apes or Angels" -- they would be more likely to be far ahead or far behind in their evolution relative to our own, and not likely to be equally evolved with us.
· Due to a roughly 50/50 chance of a world evolving amino acids and sugars that are either left- or right-handed, alien amino acids and sugars would have a roughly 50/50 chance of NOT affecting us, meaning that what might be poisonous or nutritious to an alien might not be so to us roughly half of the time.
· IF the impact theory of lunar formation is true, then those worlds that have no impact-produced moon would likely have little or no heavy metals near their surfaces. Such worlds would have quiescently settled their heavier elements (Cu, Fe, Au) into their cores, leaving lighter elements (Al, Be, Si) near the surface.
· No "star drives," teleportation/transporters, or other violations of causality.
· No "Zero-Point" energy sources, or other violations of thermodynamic laws (unless some quasars are actually the results of a race's first ZPE experiment ... and their last).
· No gravity control. This leaves out contra-gravity drives, grav plates, and inertial dampers. Therefore, low acceleration (about 1 gee), and decks are orthogonal to the drive axis. This leaves Ion drives, fusion rockets, and Bussard ramjets (maybe).
· No psionics.
· Not everybody out there speaks English!
· Not everyone who wears a red shirt will be the first to die on an alien world.
"Hard" SF adheres to the known laws of physics, and merely extrapolates on what we already know. SF "softens" when one progressively adds gimmicks or plot devices that violate one or more physical laws, thereby becoming "Space Opera."
So, here is a short list of what I think constitutes Hard Science Fiction, based on the question, "Keeping in mind our currently know physical laws, and extrapolating thereon as needed, what might we expect to find when humanity finally reaches the stars?"
· Alien races would be either "Apes or Angels" -- they would be more likely to be far ahead or far behind in their evolution relative to our own, and not likely to be equally evolved with us.
· Due to a roughly 50/50 chance of a world evolving amino acids and sugars that are either left- or right-handed, alien amino acids and sugars would have a roughly 50/50 chance of NOT affecting us, meaning that what might be poisonous or nutritious to an alien might not be so to us roughly half of the time.
· IF the impact theory of lunar formation is true, then those worlds that have no impact-produced moon would likely have little or no heavy metals near their surfaces. Such worlds would have quiescently settled their heavier elements (Cu, Fe, Au) into their cores, leaving lighter elements (Al, Be, Si) near the surface.
· No "star drives," teleportation/transporters, or other violations of causality.
· No "Zero-Point" energy sources, or other violations of thermodynamic laws (unless some quasars are actually the results of a race's first ZPE experiment ... and their last).
· No gravity control. This leaves out contra-gravity drives, grav plates, and inertial dampers. Therefore, low acceleration (about 1 gee), and decks are orthogonal to the drive axis. This leaves Ion drives, fusion rockets, and Bussard ramjets (maybe).
· No psionics.
· Not everybody out there speaks English!
· Not everyone who wears a red shirt will be the first to die on an alien world.
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