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For questions that ask if a given concept is consistent, or being used consistently, in the context of the referenced world rules. Answers should say yes or no, with supporting info. This tag should not be used with the science-based, hard-science, or science-fiction tags. Comparisons to the real world should use the science-based tag. This tag may not be used alone. This tag may not be used with the science-fiction, science-based, or hard-science tags.

2 votes

What is the most economical way to dispose of the late in space?

Transfer orbits to actually impact a planet would likely require significant fuel. A large solar mirror could likely generate temperatures high enough to cremate a body if the water loss is affordabl …
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1 vote

A really (really, really) big cliff

The Grand Teton Mountains were formed from a vertical uplift at a fault line. From Wikipedia: The Teton fault is a normal fault. Therefore movement on the fault is primarily in a vertical direction. …
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1 vote

Effects on the visual systems of humans when temporarily having several stars illuminating t...

A real issue I see with this world is that three stars isn't enough to banish night perpetually...these stars must orbit each other. So the planet orbits one star, the sunlike star. The other two …
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2 votes

Is Asteroid Harvesting economic?

The major cost in moving freight around the Solar System is fighting the gravity wells of planets. Moving material from the asteroid belt to Earth orbit is relatively cheap in terms of fuel, if you h …
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2 votes

Is a mountainous crater filled with fog realistic? Ways for a species to penetrate the fog?

Water hitting lava generates so much steam so fast you would have something like Krakatoa, and the top of your mountain would blow off. Fog usually occurs when warm air laden with humidity is cooled …
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2 votes

How could a group of 6 people destroy an army?

The Civil War battle of Glorieta Pass was a tactical win by the Confederates invading New Mexico, but turned into a disaster because a small group circled over the mountains back to the supply train a …
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0 votes

Seasons on a planet that's tidally locked with the smaller star in a dual-star system

If the planet is tidally locked with its primary. then the center of the planet facing gets a huge amount more solar energy than the rest of the planet. If this rise in temperature is too high, the a …
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7 votes

What technology is required to detect an underground civilization?

Seismic detectors would detect these cavern's interference with the detection of earthquakes' S and P waves without any new technology. Once you have them located setting off small charges on the sur …
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1 vote

Could communism become a strong alternative to capitalism in the future?

According to Ludwig von Mises, there is one serious structural problem to any socialist society: economic calculation. In a society with no money and no free trade, how does the society set a value …
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1 vote

Could Pluto/Charon support an atmosphere between them?

Robert Forward wrote a series of books starting with Rocheworld about a double planet that are so tightly coupled they aren't round, share atmosphere and at one point part of the ocean on one planet s …
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1 vote

Would a planet with very small temperature variation (between 17 and 21 degrees Celsius) be ...

The problem with this requirement for a 1% temperature uniformity on a planetary scale is that heat conducts slowly relative to the size of a planet. Conduction, winds, you name whatever temperature …
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1 vote

Possible distance travelled by horse over 6 weeks?

The Persian "Royal Road" couriers could make 240 miles a day. Mounted couriers could travel 1677 miles (2699 km) in seven days; the journey from Susa to Sardis took ninety days on foot. The Greek …
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2 votes

Architecture of the perfect zombie apocalypse refuge

Just pick a regular set of farmland and town. Then you build zombie traps around it, out of sight/hearing from your settlement. Zombies are really stupid, so this would just need to be something li …
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7 votes

How would one weaponize a black hole?

In theory you can move a black hole. If you pump charged particles into the black hole, it keeps the net charge. This would make the hole respond to an electric field and in theory movable. Of cour …
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4 votes

FTL travel is impossible. How is interstellar trade possible?

Without FTL, it almost certainly is too expensive to trade using manned vessels and negotiate on prices and values. So if you wanted to have contact and exchange, it would be better to exchange "gift …
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