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AlanSE's user avatar
AlanSE's user avatar
AlanSE's user avatar
AlanSE
  • Member for 10 years, 11 months
  • Last seen more than a month ago
48 votes
Accepted

Did the Galileo spacecraft cause a "blotch" on Jupiter after it crashed?

40 votes
Accepted

What would the size and rotation of a station need to be to produce 1g gravity from head to toe?

31 votes
Accepted

What is the largest naturally occurring body that could be hollowed and safely lived in?

30 votes
Accepted

Effect of atmospheric drag on rocket launches and benefits of high altitude launch sites

28 votes
Accepted

Is there any stable orbit around a black hole?

26 votes
Accepted

Can Venus be made habitable?

24 votes
Accepted

What maximum speeds can be expected from meteorites?

24 votes
Accepted

Delta-V chart mathematics

24 votes
Accepted

Are there any (Lagrange) points in the Solar System in perpetual shade?

24 votes

How can the reusable Falcon 9 succeed when the reusable Space Shuttle failed?

21 votes
Accepted

Are there any safe-to-launch alternatives to RTG's for outer solar system exploration?

20 votes
Accepted

Are there any theoretical size limits of man-made space stations/structures?

19 votes
Accepted

Could it be possible to launch a rocket from a balloon?

18 votes
Accepted

Calculating solar system escape and and sun-dive delta V from lower Earth orbit

17 votes
Accepted

What's the (particle) density of the asteroid belt?

15 votes

How can I derive an mass/size estimate of an asteroid from JPL parameters?

15 votes

Do nuclear batteries emit radioactive rays while in use by satellites and shuttles?

15 votes

Why is the "impossible" space drive impossible?

14 votes

Could a Human reach escape velocity by jumping from the surface of Ceres (a dwarf planet)?

13 votes
Accepted

Can we get energy from the motion of orbiting bodies?

13 votes

Realistic space battle, how it could looke like? No hollywood version or videogames like

13 votes
Accepted

What about gathering water ice from Saturn's rings?

13 votes
Accepted

Are there any effective ways for removing/decreasing oxygen in a habitat on Mars?

12 votes

What technological hurdles prevent the development of a space gun?

12 votes
Accepted

Could radiated heat propel space-craft in outer space?

12 votes
Accepted

Are there any natural circular orbits?

11 votes
Accepted

In space can the difference in temperature between the inside and outside, provide useful energy?

10 votes

Under what circumstances would an object falling out of spacecraft start orbiting that spacecraft?

10 votes

Can one put a large nickel-iron asteroid into an elliptical solar orbit that results in a soft(ish) earth landing?

9 votes
Accepted

How much Energy is required to put 1 kg in LEO?