JohnHoltz's user avatar
JohnHoltz's user avatar
JohnHoltz's user avatar
JohnHoltz
  • Member for 7 years, 5 months
  • Last seen this week
  • Pennsylvania, United States
23 votes
Accepted

Who filmed the Apollo 11 trans-lunar injection?

18 votes
Accepted

Are cherry-pickers a new thing in spaceflight?

13 votes

Exit film of moon landing departure

8 votes

How often does a geostationary satellite enter into a Lunar shadow?

6 votes

How far away can spacecraft be seen with an optical telescope?

5 votes

Historical Moon’s True Anomaly Numbers

3 votes

Meeus on the Positions of the Satellites of Jupiter

3 votes
Accepted

Was Roadster (Starman) seen in Earth orbit, before the long burn to deep space?

3 votes
Accepted

Will the real Snoopy please stand up?${}^†$ Has the candidate object for Apollo 10 lunar module been publicly identified?

3 votes
Accepted

How to calculate the local maximum solar radiation on Mars from day to day throughout a full martian year?

3 votes
Accepted

Launch Elements

2 votes
Accepted

What is/was Spitzer's schedule for end-of-life and what will be its final status?

1 vote

Duplicated and Distorted Fiducials