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Results tagged with earth
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user 897
Questions of the science and space exploration related to Earth.
4
votes
Earth rotation confusion on Stapledon book
I don't think he's saying Earth rotates to the West. He's on a trajectory eastwards that just makes it look as if Earth is rotating the other way. He's moving much faster than Earth's rotation speed. …
- 130k
5
votes
What would happen if we took out the moon?
The moon saps rotational energy from Earth and converts it into an increasing distance from the Earth. Earth's day gets longer over time as a result. …
- 130k
4
votes
Wasn't the moon landing + reentry much harder to do than SpaceX's reusable rockets/boosters?
Easier: because the Moon has a much lower gravity, you need far less energy to ascend from the Moon to an orbit around the Moon than you need for a launch from Earth. … More difficult: The hard part about the Moon landing is getting off the surface of the Earth and into Moon orbit. …
- 130k
6
votes
Which country borders are visible from space?
Belgium, sort of:
Belgium has road lighting on almost all of its roads. The neighboring countries don't. The southern Netherlands, the Ruhrgebiet and the Lille area are densely populated so the di …
- 130k
37
votes
Is a midspace space station between Earth and Mars practical?
You can insert a station into a circular orbit halfway between Earth and Mars, but because this has an orbital period also in between those of Earth and Mars, your station won't be in a usable position …
- 130k
12
votes
Would an asteroid collision affect the Moon's orbit, and what consequence would that have fo...
An asteroid big enough to affect the Moon's orbit would break off large chunks of Moon, which would result in a meteor bombardment on Earth (see Neal Stephenson's novel Seveneves for an example of that … To get the Moon to collide with Earth, I'd expect an asteroid the size of the Moon would be needed, or lots of patience.
As it is, the Moon recedes slowly: the tides rob orbital energy from the Moon. …
- 130k