uhoh
  • Member for 6 years, 1 month
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  • Taipei, Earth
4 answers
5 votes
11k views
2 bookmarks
Sun synchronous orbit and LTAN
3 answers
26 votes
3k views
5 bookmarks
Is it possible to have an orbit around the earth and the moon
1 answers
3 votes
192 views
1 bookmarks
STK Computation of DUT1
4 answers
21 votes
3k views
2 bookmarks
Do you need to burn fuel between gravity assists?
1 answers
6 votes
494 views
1 bookmarks
What Platinum minerals are expected to be found in Asteroids?
2 answers
12 votes
2k views
2 bookmarks
Picture of equipment left on the Moon?
2 answers
7 votes
729 views
2 bookmarks
How much of the sky can the JWST see?
4 answers
28 votes
12k views
10 bookmarks
Is there any way to find and track Pioneer 10, 11, and Voyager 1, 2?
2 answers
12 votes
3k views
3 bookmarks
Lightest possible solar array?
2 answers
6 votes
544 views
2 bookmarks
How to generate Chebyshev coefficients to produce an ephemeris file?
4 answers
11 votes
5k views
1 bookmarks
Where can I find data for Atmospheric density vs. altitude?
1 answers
11 votes
773 views
2 bookmarks
What definition of "LEO" does SpaceX use when specifying payload capability?
4 answers
3 votes
297 views
2 bookmarks
"Stationary" Space Probe
3 answers
5 votes
828 views
1 bookmarks
Could thermal energy be collected by dragging a thermoconductive device against the outer atmosphere
2 answers
5 votes
1k views
2 bookmarks
Why does NASA Horizons say that Earth inclination is not 0 at J2000 epoch?
1 answers
7 votes
405 views
1 bookmarks
How far from earth have atomic clocks (or ultra-stable oscillators) been placed and monitored?
2 answers
6 votes
697 views
1 bookmarks
Frequency and modulation mode(s) for the SpaceX Tesla roadster mass in space
2 answers
8 votes
430 views
1 bookmarks
Have there been any probes launched that were actually clusters of probes?
3 answers
16 votes
514 views
6 bookmarks
How would time measurement be done over great distances?
7 answers
31 votes
8k views
3 bookmarks
Do things get dirty in space?
0 answers
2 votes
43 views
1 bookmarks
How often has weather interfered with the Deep Space Network?
1 answers
2 votes
413 views
2 bookmarks
How to calculate the change in inclination due to perturbations?
1 answers
6 votes
536 views
1 bookmarks
Understanding gravitational keyhole analysis for Near-Earth Objects
2 answers
5 votes
1k views
3 bookmarks
How long does one orbit around the Moon take in a typical parking orbit for a stage a lander is going to meet?
2 answers
4 votes
930 views
3 bookmarks
Why has no TLE been published for the DSCOVR satellite and the Falcon 9 R/B?
3 answers
9 votes
1k views
2 bookmarks
How is the minimal $\Delta v$ transfer between non-coplanar orbits calculated?
2 answers
10 votes
460 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
52k views
11 bookmarks
Why is SpaceX considering Methane as fuel for their next engine, the Raptor?
2 answers
3 votes
300 views
1 bookmarks
State of the art of satellite Attitude Determination and Control Systems
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