Posts by Monica Cellio
Some answers to this question about mining asteroids suggest that it is easier and cheaper, in the long run, to bring the asteroid to you: move it into orbit around the planet where you are already...
A moon is, fundamentally, a rock that's caught in the gravitational field of a bigger rock (a planet) and drawn into an orbit. Some of Saturn's moons, for example, are speculated to be debris from...
I have a planet orbiting one star in a binary system. When the planet is exactly between the two stars it will experience a double day; when the primary sun sets the secondary one rises, no overla...
I have an earth-like planet orbiting one of the stars in a binary system. I have learned that, for G-class stars, if the secondary star is 100AU from the primary one, I can expect the secondary st...
This blog post about binary-star systems points out that, rather having the stars be close together, they could be far apart and a planet might orbit just one of them. It gives the example of the ...
I agree with another answer that, if your cultural values permit it, giving over the dead to the trolls could work. That'd be a tough sell for early-middle-ages Europe, but then, caring about trol...
In Can I significantly shorten the days on a planet that can support human life? I asked about changes needed to a planet to support human life with a much-shorter day (12 hours or so instead of 24...
As this answer says, most musical instruments as we know them won't work underwater. You might see something completely new arise, but we should assume that people will first reach for what is eas...
I would like to have a world on which humans can live unaided -- they can breathe, the climate is workable, they can eat the local vegetation, etc -- but on which a complete day is substantially sh...
From this chart it appears that the star types closest to our own are K-type (oranger, a little cooler, and less than half as bright) and F-type (bluer, a little warmer, and much brighter). If I w...
For many uses, I agree with this answer that you would see local internets serving live content (as now) backed by interplanetary replication. The technology exists today to manage large data repo...
By putting prisoners in a place where they wouldn't be able to survive on their own, you are taking on a larger burden of caretaking: What if there is a mechanical or electrical failure on the st...
I have a city in space that will have a local population and a lot of travel in and out (center of commerce). Should I place it out in open space or near a planet? Being near a planet obviously i...
I would like to have Earth slowly move away from the sun, taking somewhere between several months and a couple of years to reach the point where human life on the surface is no longer possible. (T...
Denver has about 17% less oxygen than at sea level. Note that this isn't reduced concentration; there's just less air. This answer doesn't address the increased proportion of other elements in th...
I've asked before about my polytheists with competing moon gods. I now have a better understanding of how tides -- a very visible manifestation of lunar influence -- work with multiple moons (than...
Broadly speaking you need three things: (1) something that makes it infeasible to keep living on land (most people won't move unless pushed), (2) the inability to evacuate from the planet, and (3) ...
In my future setting on Earth (or an Earth-like planet; haven't decided), the fields of robotics and AI have taken off and we have intelligent, ambulatory robots. (They were initially thought of a...
I have a colony of humans living underground in man-made catacombs on another planet. They are, essentially, digging/blasting as they go; they did not create a complete underground city first and ...
Humans (even programmers :-) ) are used to having some access to natural light, but in a colony in space, on the dark side of a tidally-locked planet, or underground (for example) this won't happen...
I have a colony of humans on Mars, living in enclosed cities to maintain breathable air. (If they need to leave, they suit up.) Assuming modern-day technology, how do I figure out how many people...
We know that planets can have multiple moons, sometimes quite a few (like Jupiter). Assuming that a planet with several moons were habitable in the first place and has significant oceans (greater ...
On Earth, solar flares can lead to displays of the aurora that are both more spectacular and visible farther south. Flares in September 2014 led to the aurora being visible in Maine, which is arou...
In settings with space travel we often see stories that rely on ships encountering each other, such as space piracy (which means you need to know where to wait in ambush), or distress signals that ...
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