Unanswered Questions
1,716 questions with no upvoted or accepted answers
20
votes
0answers
484 views
What is the current location of Link-built Apollo Mission Simulators?
There seems to be confusion about the final disposition of, and even the number of, Apollo Mission Simulators built by Link Flight Simulation Division. This question is not about any simulator built ...
17
votes
1answer
2k views
How many astronauts have had spiritual experiences while in space?
In the video Overview 5 astronauts talk about having powerful spiritual experiences in space, and their descriptions match enlightenment experiences. This strikes me as rather more important than you'...
15
votes
1answer
957 views
What is the value of the cross-track angle between the two designated CRS-4 first stage recovery zones?
For the SpaceX Falcon 9 launch on its Dragon/CRS-4 cargo delivery mission to the International Space Station, according to Spaceflight 101, two downrange safety zones have been identified:
The SpX-...
14
votes
0answers
341 views
Have there ever been any incidents where something valuable was unintentionally throw out with the trash?
In "What do astronauts do with their trash on the ISS?", a commentator asked the title question and was encouraged to make it a new question, but apparently never did.
The linked question is ...
14
votes
0answers
250 views
What were the Top 10 Shuttle Risks in John Young's “famous letter”?
Whilst reading A Technical History of the External Tank I ran across this comment:
Although the problem has not recurred, John Young, in his
famous top ten Shuttle risk letter ...
14
votes
0answers
317 views
How did “the kid” (John Meisenheimer) calculate that there was a wave in the jet stream and Explorer 1 would be okay to launch?
The tough but timely question NASA at sIxty years, will there be a new moonshot mandate? links to the NASA YouTube video NASA 60th: How It All Began which shows a lot of really nice, historical file ...
12
votes
0answers
387 views
How does it feel to breathe 100% oxygen at low pressure?
Some space suits are designed to provide an atmosphere of 100% oxygen but at a reduced air pressure about 20% that of sea level.
Is breathing in such a suit uncomfortable? It seems like having such a ...
12
votes
0answers
183 views
Has NASA ever included a ground controller or astronaut becoming insane/irrational/belligerent in a training simulation?
NASA training simulations have included a wide variety of problems thrown at the pilots and ground controllers -- not only the typical technical failures, but also some unusual outside-world stuff ...
11
votes
0answers
200 views
How much does the ISS “banana” or flex under the constantly changing conditions of solar heating?
This answer to Do antennae on the ISS have to constantly move to maintain data links? discusses some of the challenges precisely pointing an antenna mounted to the ISS exterior. While the ISSs orbit ...
11
votes
0answers
162 views
How does increased environmental radiation affect medication potency, long and short term?
The issue of the effects of radiation on medication potency is not only important for long term stays in the ISS, but also very important for longer duration journeys and even for colonization.
One ...
10
votes
0answers
1k views
Which launch was the first to use a dogleg maneuver?
Jake Blocker's excellent answer explains what a dogleg maneuver is, what it's for, what it looks like, and even what a real dog's leg looks like for comparison!
A dogleg maneuver is done to change ...
10
votes
0answers
134 views
Is loss of flexibility a concern with crew on the ISS?
Videos of people on the ISS make it clear how little they need to bend or stretch, and how their joints stay in their neutral position most of the time as they float around - elbows, knees and hips ...
9
votes
0answers
146 views
What could be strong arguments against Ingenuity following Perseverance at a safe distance when the flight test program has been a success?
This answer to the question "How long could the Mars helicopter Ingenuity keep up with the Perseverance rover if it wanted to?" reasons that indeed it could for years !
But according to the ...
9
votes
0answers
116 views
Does the SpaceX spacesuit address any of the criticisms of ACES raised by Columbia Crew Survival Investigation Report?
A brief history of what Shuttle crews wore for ascent and entry, from the Columbia Crew Survival Investigation Report:
The shuttle was originally designed to be operated in a shirtsleeve (bare-hands) ...
9
votes
0answers
161 views
Why is the water pumped out of the holding tank a minute before Falcon 9 liftoff?
SpaceX Falcon 9 - starlink mission on October 5. Video :
Why is the water discharged at T- 01m:30s from the holding tank far away from the launch pad?
This was also ...
