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Engine configuration for lander

Which is a more stable lander design: 1.Single central engine. 2.Multiple engines located near the corners Following is the design for Tianwen-1, the Chinese Mars lander: ...

Asked on 09/28/2021 by Navoneel Karmakar

0 answer

Could the Space Shuttles other than Enterprise easily do drop tests from the Shuttle Carrier Aircraft?

This question was inspired by comments on this answer. The Space Shuttle prototype Enterprise was only used for approach and landing tests, for which it was flown on a...

Asked on 09/28/2021

0 answer

Procedure to deal with the death of Apollo astronaut during a lunar mission

During Apollo lunar missions, had the command module pilot have died while the other two astronauts were on the Moon, or had only one of the two lunar walkers died,...

Asked on 09/28/2021

1 answer

Altitude at which Falcon boosters go subsonic during reentry

Is there a distinct altitude at which Falcon boosters goes subsonic during reentry? If so, which is it? Is it +/- the same altitude for every flight?...

Asked on 09/28/2021 by George Knap

0 answer

Why is geosynchronous orbit an altitude, rather than a velocity?

When people talk about geosynchronous orbit--an orbit in which the satellite continuously remains "directly overhead" for the same ground position on Earth--they talk about it being at a specific altitude,...

Asked on 09/28/2021

8 answer

Cyclotron engines as a means of thrust for interplanetary travel?

How feasible is it to use a cyclotron in this manner for space propulsion? Inject small amounts (aliquots) of ionized matter into cyclotron at some high integer multiple n of...

Asked on 09/28/2021 by dualredlaugh

2 answer

Why does the video feed always fail during Falcon 9 landings?

I'm in love with SpaceX and Falcon 9, I watch every live stream and the most special, most amazing, most thrilling part of each launch is the 1st stage landing....

Asked on 09/28/2021

3 answer

If the SpaceX drone ship's camera feed gets disrupted every landing, why cant they throw the antennae off the ship on a buoy for better reception?

They mentioned on the live stream that this is because of the shaking antennae. It has also been discussed on here before why this happens:Why does the...

Asked on 09/28/2021 by user1886419

3 answer

How exactly did the floor of an Apollo LM look like after EVA(s)? Seeking photo!

Five years ago I posted a question entitled "How was dust-mitigation addressed during the Apollo program?". While the question was answered rather comprehensively, it left me even more curious....

Asked on 09/28/2021 by s-m-e

2 answer

What is the cause of the data discrepancy between these two Apollo 11 Reports

Table 7-11 on page 7-9 of MSC-00171 Apollo 11 Mission Report lists the CSM/S-IVB separation occurring 3 hours, 17 minutes and 4.6 seconds into the mission, at...

Asked on 09/28/2021 by user20636

2 answer

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