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Top Questions

18 votes
7 answers
3k views

What is measured with g-forces?

18 votes
7 answers
3k views

Is there something inherently more difficult about servicing satellites in the 2nd Sun-Earth Lagrangian point?

10 votes
3 answers
4k views

When staying indoors, can missing gravity be replaced with blowing air?

6 votes
2 answers
3k views

Why does the Falcon 9 first stage continue to decelerate after its reentry engine burnout?

10 votes
4 answers
3k views

Is it possible for an Orion drive-based spaceship to experience smooth artificial gravity?

30 votes
1 answer
3k views

What kind of "safe" was carried on the Space Shuttles?

8 votes
1 answer
3k views

Why did NASA's Soujourner Mars rover die at the same time as Pathfinder?

6 votes
2 answers
1k views

What are the advantages and disadvantages of using either liquid hydrogen or liquid methane based rocket fuels?

11 votes
1 answer
2k views

What's the typical temperature of a reactor core in a nuclear thermal rocket?

6 votes
1 answer
892 views

Will Roadster ever encounter Mars?

5 votes
1 answer
2k views

How long can the SpaceX Starlink satellites survive before they deorbit?

5 votes
2 answers
507 views

Is there any orbital launcher capable of removing the second stage from orbit after inserting the payload satellite into LEO?

3 votes
1 answer
593 views

What are the regularly spaced spots on this piece of material on the surface of Mars?

4 votes
1 answer
200 views

Why is the ISS camera (nearly) always off when passing over/near French Southern and Antarctic Lands / FSAL well south of India?

5 votes
2 answers
250 views

Would it be practical to fly a probe to Mars using gravitational assistance from Venus?

2 votes
1 answer
170 views

If humans lived on the moon, could they send a mission with the same goals as Apollo to the Earth?

5 votes
1 answer
258 views

How can uncertainty about the position of an object decrease over time?

3 votes
2 answers
189 views

Could there be caves on Mars in the areas inside Jezero crater and the watershed west and north of it where the Mg carbonates are detected?

4 votes
3 answers
101 views

Confusion regarding the series for true anomaly on Wikipedia

1 vote
1 answer
221 views

Why does igniting propellant provide more thrust?

3 votes
1 answer
187 views

What would happen during an inflight abort in a Falcon 9 if the booster engines did not shut down?

1 vote
1 answer
124 views

Collecting suns cosmic rays

3 votes
2 answers
157 views

How would building rockets on other planets and moons influence their design?

5 votes
2 answers
69 views

Relationship between osculating eccentricity and Brouwer-Lyddane short eccentricity

2 votes
2 answers
83 views

How and who calculated the thrust required from first stage of launch vehicle Saturn V for moon landing?

5 votes
1 answer
131 views

basis for designing fins of a space launch vehicle

12 votes
0 answers
230 views

Have astronauts ever used the helmet-to-helmet technique to talk to one another in vacuum?

3 votes
2 answers
116 views

How much solar radiation hits a spacecraft in transit to Mars?

1 vote
2 answers
102 views

Determine Yaw, Pitch, Roll from two vectors

3 votes
1 answer
155 views

What is this squiggly moving line in the recent SpaceX SARah-1 Mission?

2 votes
1 answer
117 views

How to calculate catalyst bed geometry (length/radius) for a monopropellant thruster?

4 votes
1 answer
82 views

Where do I find ECEF coordinates of a satellite?

1 vote
2 answers
82 views

Rover wheel placement

2 votes
1 answer
130 views

Does NASA already have James Webb Space Telescope's 1st science photos with them?

4 votes
1 answer
98 views

Chamber Pressure and Burn Rate equations

0 votes
2 answers
76 views

Why is it assumed that space flights have to be safe?

1 vote
1 answer
73 views

What is the propellant consumption rate for Soyuz?

2 votes
1 answer
145 views

Spacecraft Disaster [closed]

4 votes
0 answers
181 views

Why is SpaceX spraying water on their barges?

6 votes
1 answer
66 views

What size are the typical keep-inside boxes of geostationary telco satellites?

3 votes
0 answers
176 views

Oddities near Kennedy Parkway

5 votes
0 answers
137 views

Is there a name for this type of 'Spin Gravity' ship configuration?

2 votes
1 answer
80 views

Plot ellipse using elements from TLE

3 votes
1 answer
124 views

How feasible and cost effective is a superconductive electromagnetic orbital gun for cargo transportation between the orbits of different planets? [closed]

4 votes
1 answer
75 views

Draper Labs' Control Moment Gyroscope Spacesuit

1 vote
0 answers
145 views

Would a ring system for the Earth be a net benefit in terms of climate change? Is an artificial ring feasible? [closed]

3 votes
0 answers
138 views

Feasibility of Brilliant Pebbles Missile Defense [closed]

4 votes
0 answers
133 views

Why was the "lunar launch window" different between the Cape Canaveral and Baikonur launch sites?


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