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uhoh
  • Member for 6 years, 9 months
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  • Taipei, Earth
20 votes
4 answers
5k views

Why can't you travel to Mars in a straight line?

  • 459
10 votes
2 answers
2k views

The design of the halo orbit of the James Webb Space Telescope

  • 2,639
5 votes
1 answer
325 views

I'm going to invade Europa, any international interferences that could stop me?

  • 963
25 votes
3 answers
5k views

What is the "mass" of a Lagrange point?

9 votes
3 answers
5k views

How do we come up with the gravity assist (or slingshot) formula?

  • 602
14 votes
3 answers
1k views

Is there an intuitive reason for why the shape of the orbit at perigee is the mirror image of that at the apogee?

6 votes
1 answer
564 views

Understanding gravitational keyhole analysis for Near-Earth Objects

1 vote
2 answers
74 views

Apparent Centering Problem When Using the Perifocal System to Draw Orbital Ellipses

  • 43
23 votes
3 answers
6k views

Why would oxygen be stored as a super critical fluid?

31 votes
4 answers
5k views

When will we send floating probes to Venus?

4 votes
1 answer
1k views

From what material and how are the Merlin engines and nozzles of it (sea level) manufactured?

  • 91
126 votes
4 answers
33k views

Do the planets really orbit the Sun?

  • 1,757
8 votes
1 answer
269 views

How did the Curiosity rover on Mars manage to crack open a large area after drilling a hole?

  • 11k
4 votes
2 answers
458 views

How should the ISS telemetry for attitude be converted to roll, pitch, and yaw?

5 votes
2 answers
608 views

Besides the (currently down) HDEV, are there other public live video feeds from the ISS?

6 votes
1 answer
1k views

J2 long-period perturbations in the inclination

22 votes
4 answers
3k views

Do you need to burn fuel between gravity assists?

3 votes
1 answer
203 views

STK Computation of DUT1

  • 1,869
6 votes
2 answers
177 views

What is being shown on August 27th from the NOAA ACE satellite?

5 votes
2 answers
275 views

How does a change in velocity affect the properties of an orbit in a 2D plane?

7 votes
3 answers
989 views

How many earth stations had astronauts on-site during John Glenn's orbit in Friendship-7?

  • 148k
3 votes
2 answers
349 views

Calculating spacecraft thrust manoeuvres with JPL data

  • 163
4 votes
4 answers
411 views

Using what technology one can keep a spacecraft truly non rotating

  • 2,818
6 votes
2 answers
683 views

How to generate Chebyshev coefficients to produce an ephemeris file?

4 votes
2 answers
1k views

Why does NASA Horizons say that Earth inclination is not 0 at J2000 epoch?

16 votes
3 answers
520 views

How would time measurement be done over great distances?

  • 303
15 votes
2 answers
2k views

Can the satellites in Martian orbit be put to use providing a rudimentary GPS system on Mars?

  • 13.6k
1 vote
1 answer
88 views

What is the parameter which stays constant at a location for downloading from Sentinel Copernicus Data?

2 votes
0 answers
44 views

How often has weather interfered with the Deep Space Network?

  • 46.6k
3 votes
1 answer
479 views

How to calculate the change in inclination due to perturbations?

  • 283
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