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 Popular Question
Question with 1,000 views. This badge can be awarded multiple times.
Awarded 3480 times.
What is the density of supercooled LOX at −206 °C, as SpaceX uses it
Awarded 10 hours ago
Were crew assignments ever made to avoid grouping astronauts with similar first names?
Awarded 11 hours ago
Transform ECI to ECEF
Awarded yesterday
What were the Curiosity sky-crane’s descent engines?
Awarded 2 days ago
How difficult is it to convert a hypergolic based Moon human lander to a cryogenic one?
Awarded 2 days ago
What equipment was taken from Earth to the surface of the Moon and back?
Awarded Mar 30 at 14:00
C3 calculation in interplanetary missions
Awarded Mar 30 at 9:45
Why did the KH-11 get the nickname “Kennen”?
Awarded Mar 30 at 1:00
Why is there a Saturn V in the background of this Gemini-Titan launch?
Awarded Mar 29 at 20:50
Satellite altitude as a function of time?
Awarded Mar 29 at 17:00
How long does one orbit around the Moon take in a typical parking orbit for a stage a lander is going to meet?
Awarded Mar 29 at 7:55
Why did the hose connectors on Apollo spacesuits come in pairs?
Awarded Mar 28 at 15:30
What is different from the R-7 that launched Sputnik, to the Soyuz launcher used for Soyuz/Progress launches?
Awarded Mar 27 at 13:10
Best time to perform an orbital inclination change — during ascent, or once in circular LEO?
Awarded Mar 26 at 2:50
In the context of calculating mass flow rate from thrust and Isp, how would an additional efficiency be defined?
Awarded Mar 25 at 18:45
How is solid rocket fuel sourced?
Awarded Mar 25 at 16:10
How would a drone work in centrifugal force generated “gravity”?
Awarded Mar 25 at 15:25
Is space mining and development as shown in the television show “The Expanse” realistic?
Awarded Mar 25 at 0:40
What is considered a good SNR for satellites?
Awarded Mar 24 at 21:10
Karman line analog on other celestial bodies
Awarded Mar 24 at 20:45
Did astronaut Scott Kelley eat cake in space?
Awarded Mar 24 at 15:20
Does lower gravity on Mars make it unsafe and unhealthy for humans?
Awarded Mar 24 at 14:50
How would people measure time on Venus?
Awarded Mar 23 at 22:55
Error detection and correction techniques on New Horizons data
Awarded Mar 23 at 14:00
What did I see just before the ISS but on a different trajectory?
Awarded Mar 23 at 12:45
How long would it take to travel to Proxima b?
Awarded Mar 23 at 12:25
What happens to materials which burn up during reentry?
Awarded Mar 22 at 12:25
How is the space station's interior cleaned?
Awarded Mar 22 at 3:55
Was not saving the Apollo 13 astronauts ever considered as an option?
Awarded Mar 20 at 9:40
What kinds of things have been tossed out of the ISS?
Awarded Mar 19 at 22:00
Was the Apollo 13 CO2 problem a matter of capacity, or of rate?
Awarded Mar 19 at 15:05
What is the day/night cycle at the north pole of Mars?
Awarded Mar 18 at 23:30
How do you Model Hyperbolic Orbits?
Awarded Mar 18 at 5:15
What is the warmest place on Mars?
Awarded Mar 18 at 1:55
Could the Apollo astronauts distinguish Earth's continents and oceans from the moon?
Awarded Mar 17 at 15:30
Apollo Command Module heatshield tube - what was it for?
Awarded Mar 17 at 13:30
Why aren't superconductors used more in space?
Awarded Mar 17 at 12:35
Why is NASA building its own rocket for the moon mission when it could use SpaceX's?
Awarded Mar 16 at 16:55
Could the lunar module have moved to a different spot?
Awarded Mar 16 at 9:30
Why were there green ignition flashes after Falcon 9's landing?
Awarded Mar 15 at 17:10
Is potable water in the American & Russian segments still stored separately?
Awarded Mar 15 at 4:00
How does tank pressurization work?
Awarded Mar 14 at 18:35
Earth Moon Pork chop plot
Awarded Mar 13 at 12:05
Why create a production line for the SpaceX Starship?
Awarded Mar 13 at 3:40
Origin of term “Block I”, “Block II”, etc
Awarded Mar 12 at 16:50
How do engineers know new engines will work nominally once they reach space?
Awarded Mar 12 at 10:35
Why not use tap-off gas for repressurization for a simple rocket engine cycle?
Awarded Mar 11 at 23:20
Relativistic Rocket Equation
Awarded Mar 11 at 20:55
How did astronauts frame photos without a viewfinder?
Awarded Mar 11 at 17:35
Is this C# code to obtain the coordinates of the planets correct?
Awarded Mar 10 at 23:45
Did the astronauts seated on the space shuttle mid-deck have responsibilities during reentry and landing?
Awarded Mar 10 at 13:40
How is blow-back prevented in monopropellant chemical rockets?
Awarded Mar 9 at 10:45
Will this magnetorquer configuration effectively desaturate a reaction wheel?
Awarded Mar 8 at 14:50
Why would someone need vertical loading for a SpaceX rocket?
Awarded Mar 8 at 14:10
Could one skydive from a space capsule that just had a parachute failure during re-entry?
Awarded Mar 8 at 8:55
What are the pros and cons of expansion-deflection nozzle?
Awarded Mar 6 at 16:20
Why will Canberra be able to listen to Voyager 2 but not talk to it?
Awarded Mar 5 at 14:50
Artificial gravity on Mars
Awarded Mar 4 at 21:00
What is a thrust puck on Starship?
Awarded Mar 3 at 15:25
What exactly is the orange insulation foam used on many different launch vehicle stages?
Awarded Mar 3 at 9:00
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