Unanswered Questions

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 ...

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 ...

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?

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 ...

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 ...

All other SM's were silver except Apollo 6. I'm wondering what the justification for this was, if any?

Let's assume the 1U cubesat sized object is a solid block of convenient material, convenient shape and color, with no propulsion, no communication. It's sent chemically and meant to reach Alpha ...

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.

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 ...

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 ...

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 ...

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 ...

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 ...

How do people know how big the rocks are in the photos of Titan's surface?

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 ...