uhoh
  • Member for 6 years, 2 months
  • Last seen this week
  • Taipei, Earth
3 answers
9 votes
1k views
2 bookmarks
How is the minimal $\Delta v$ transfer between non-coplanar orbits calculated?
2 answers
10 votes
465 views
1 bookmarks
Which side of Europa is which?
4 answers
24 votes
5k views
4 bookmarks
How does the Falcon 9 know where the landing barge/pad is?
10 answers
71 votes
53k views
11 bookmarks
Why is SpaceX considering Methane as fuel for their next engine, the Raptor?
2 answers
3 votes
303 views
1 bookmarks
State of the art of satellite Attitude Determination and Control Systems
2 answers
8 votes
2k views
1 bookmarks
Could you launch rocks from the Moon to hit Earth?
1 answers
3 votes
335 views
1 bookmarks
In what ways would the high elliptical orbit of Apollo "E missions" simulate lunar missions?
0 answers
4 votes
721 views
1 bookmarks
TLE/SGP4 state vector accuracy assessment
3 answers
25 votes
22k views
11 bookmarks
Delta-V chart mathematics
1 answers
4 votes
626 views
2 bookmarks
How do you calculate the lat and lon of a point on the earth using azimuth and elevation seen from a geostationary satellite?
1 answers
10 votes
1k views
2 bookmarks
What are the practical uses of a state transition matrix?
3 answers
22 votes
3k views
3 bookmarks
Qualitative differences between gravity and a spinning habitat
1 answers
8 votes
372 views
1 bookmarks
How long can a moon orbit a planet?
1 answers
3 votes
304 views
1 bookmarks
Low-thrust spiraling to escape, is the flight path angle (gamma) at C3=0 always 39 degrees?
2 answers
12 votes
2k views
3 bookmarks
What is/was the smallest orbital launch system, by total mass?
1 answers
4 votes
4k views
2 bookmarks
ECI to LVLH conversion
3 answers
6 votes
362 views
1 bookmarks
Has any man-made satellite or space vehicle ever been hit by a natural meteoroid?
1 answers
3 votes
200 views
1 bookmarks
What did New Horizons photograph that was close enough to be out of focus?
5 answers
42 votes
14k views
4 bookmarks
Why haven't more spacecraft/satellites been hit by debris?
6 answers
15 votes
25k views
2 bookmarks
Can an artificial satellite stay in orbit forever?
2 answers
11 votes
383 views
3 bookmarks
How close to 2014 MU₆₉ can New Horizons get?
3 answers
13 votes
4k views
3 bookmarks
How long does Max-Q last?
2 answers
12 votes
23k views
3 bookmarks
How are New Horizons images sent back to Earth?
4 answers
4 votes
399 views
1 bookmarks
Using what technology one can keep a spacecraft truly non rotating
10 answers
51 votes
12k views
18 bookmarks
Game for teaching basics of orbital mechanics
2 answers
5 votes
2k views
3 bookmarks
Calculating velocity state vector with orbital elements in 2D
5 answers
14 votes
21k views
5 bookmarks
Cubesat Launch Costs
7 answers
30 votes
9k views
5 bookmarks
Why weren't Saturn V and the Soviet N-1 Moon rockets made larger in order to simplify Lunar missions?
2 answers
2 votes
1k views
2 bookmarks
how and why is image processing used on spacecrafts?
7 answers
22 votes
20k views
5 bookmarks
What are these orientations called in orbit?
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