User AlanSE

48 votes

Accepted

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

answered Jul 31, 2013 at 13:17

40 votes

Accepted

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

answered Jul 17, 2013 at 17:09

30 votes

Accepted

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

answered Jul 25, 2013 at 15:21

30 votes

Accepted

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

answered Jul 26, 2013 at 16:19

26 votes

Accepted

Is there any stable orbit around a black hole?

answered Sep 12, 2013 at 14:10

24 votes

Accepted

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

answered Feb 3, 2014 at 15:39

24 votes

Accepted

Can Venus be made habitable?

answered Aug 18, 2013 at 18:12

24 votes

Accepted

What maximum speeds can be expected from meteorites?

answered Jul 17, 2013 at 18:04

24 votes

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

answered Feb 9, 2015 at 17:02

23 votes

Accepted

Delta-V chart mathematics

answered Sep 20, 2013 at 13:06

21 votes

Accepted

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

answered Jul 22, 2013 at 14:11

20 votes

Accepted

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

answered Jul 29, 2013 at 19:38

19 votes

Accepted

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

answered Aug 28, 2013 at 14:51

17 votes

Accepted

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

answered Jul 22, 2013 at 13:38

17 votes

Accepted

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

answered Feb 6, 2014 at 14:34

16 votes

Why is the "impossible" space drive impossible?

answered Aug 1, 2014 at 18:29

15 votes

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

answered Jul 16, 2013 at 22:01

15 votes

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

answered Aug 27, 2013 at 16:53

14 votes

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

answered Nov 13, 2013 at 1:34

13 votes

Accepted

Can we get energy from the motion of orbiting bodies?

answered Oct 15, 2013 at 17:42

13 votes

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

answered Aug 11, 2014 at 15:11

13 votes

Accepted

What about gathering water ice from Saturn's rings?

answered Oct 3, 2014 at 22:49

13 votes

Accepted

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

answered Mar 9, 2015 at 5:41

12 votes

What technological hurdles prevent the development of a space gun?

answered Feb 27, 2014 at 16:10

12 votes

Accepted

Are there any natural circular orbits?

answered Nov 23, 2013 at 15:07

11 votes

Accepted

Could radiated heat propel space-craft in outer space?

answered Feb 4, 2014 at 20:29

11 votes

Accepted

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

answered Jul 28, 2013 at 16:31

11 votes

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

answered Jul 17, 2013 at 20:51

10 votes

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

answered Jul 7, 2014 at 17:39

9 votes

Theories of what asteroid macroporosity actually means

answered Sep 20, 2013 at 13:21

Stack Exchange Network

69 Answers

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

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

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

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

Is there any stable orbit around a black hole?

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

Can Venus be made habitable?

What maximum speeds can be expected from meteorites?

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

Delta-V chart mathematics

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

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

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

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

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

Why is the "impossible" space drive impossible?

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

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

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

Can we get energy from the motion of orbiting bodies?

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

What about gathering water ice from Saturn's rings?

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

What technological hurdles prevent the development of a space gun?

Are there any natural circular orbits?

Could radiated heat propel space-craft in outer space?

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

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

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

Theories of what asteroid macroporosity actually means