Unanswered Questions
2,378 questions with no upvoted or accepted answers
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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
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1
answer
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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 ...
16
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668
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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?
13
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519
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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 ...
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13
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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 ...
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13
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780
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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?
13
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1
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539
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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.
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12
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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 ...
10
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261
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Is there any raw video footage of the N1 rocket online?
In the 1960s, the Soviets were also in the race with the Americans to place a man on the Moon. So, for their lunar program, they designed the N1 rocket, which was basically the (failed) counterpart to ...
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10
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170
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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 ...
CommunityBot
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10
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258
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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 ...
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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 ...
CommunityBot
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9
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Have there ever been any in-depth designs for a crewed exploratory mission to Mercury?
I have seen some sources talking about the idea of a colony on Mercury, with the justification being that it would be similar to Earth's Moon, but with more solar power to use and higher gravity to ...
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How do people know how big the rocks are in the photos of Titan's surface?
How do people know how big the rocks are in the photos of Titan's surface?
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New spin on laundry day: How will ISS cope with washing machine vibration and angular momentum?
Although the ISS currently has no laundry facilities, NASA’s Glenn Research Center sponsored a washing machine design contest to do the drudgery during spaceflight. Plans have been made for testing a ...
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