Unanswered Questions
2,286 questions with no upvoted or accepted answers
20
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465
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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 ...
18
votes
1
answer
908
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28V vs. 124V on the ISS
Apparently the US segment of the ISS runs on 124v DC, while the Russian segment is on 28v DC. Why the difference? I understand it is often safer to have several different voltages rather than one, but ...
CommunityBot
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13
votes
0
answers
447
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What would be the disadvantages in Ingenuity accompanying 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 ...
- 5,400
13
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0
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260
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Does Crew Dragon have a quick-release hatch?
After today's Crew Dragon launch was scrubbed, it took the pad ninjas at least ten minutes to open the hatch. One of the major criticisms of the Apollo Block 1 hatch design after the Apollo 1 fire ...
- 569
13
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0
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480
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What spinoff technologies have come from the Soviet/Russian space program?
There is plenty of information available on NASA spinoff technologies including a Wikipedia page and Space SE question. What innovations are a byproduct of the Russian space program?
- 1,286
11
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1
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547
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Has a rocket engine with LOX as the oxidizer ever fired beyond the GEO belt?
Intuitive Machines' Nova-C lunar lander is scheduled to launch in mid-February of this year. Notably, the lander uses liquid methane as fuel and liquid oxygen as the oxidizer, and it will rely on this ...
CommunityBot
- 1
11
votes
0
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Were there any launch vehicles with so heavily pronounced Plume Induced Flow Separation (PIFS), other than Saturn V?
This answer describes a very interesting phenomenon of Plume Induced Flow Separation on Saturn V vehicle.
(Apollo-6 S68-29737 photo, courtesy NASA)
This is, basically, when "fire" from ...
CommunityBot
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11
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0
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365
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What's the shiny triangular feature on this Progress vehicle?
Picture from here
What's the shiny, slightly curved triangular plate with rails above it?
A larger version, cropped from here, thanks to a comment by ohsin.
11
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598
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Why was the Apollo 6 service module painted white?
All other SM's were silver except Apollo 6. I'm wondering what the justification for this was, if any?
- 2,315
10
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112
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Will Europa Clipper and JUICE be able to see each other?
Both will be in Jupiter orbit at the same time in the early 2030s, and both have sizable solar arrays and high resolution cameras- will either of them ever be close enough to spot each other? Mars ...
- 149k
10
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Is there anything that could speak 900 MHz ZigBee that could hear Ingenuity helicopter besides the Perseverance rover?
Interest is piqued by What could be strong arguments against Ingenuity following Perseverance at a safe distance when the flight test program has been a success?
Question: Can anything at Mars, or ...
- 149k
9
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183
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Looking for information on this Apollo era CGI animation
In the NASA documentary The Computer and Manned Space Flight, early CGI animations of lunar landing, rendezvous, earthrise etc. are shown. The narration says that these simulations were made prior to ...
- 191
9
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270
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Has there ever been a deliberate "Find A Satellite" challenge? Actually, could there be?
Companies often offer rewards for finding security issues in their products or their own IT systems, and hackathons have a long history.
I'm just wondering if there has ever been a deliberate ...
- 149k
9
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291
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+100
Crew Dragon: How thick is the skin?
Auto body panels are about 20-gauge, or just under 1 mm thick. This is fine for many reasons: thin panels are light for good fuel economy and crumple easily for shock absorption without unnecessary ...
- 149k
9
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Escape system of SLS vs Ares I
One of the criticism directed at the Ares I rocket was the danger during a launch termination of the solid-propellant 1st stage. As far as I understood it, a terminated Titan IV solid-propellant ...
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