User antlersoft

17 votes

If one Starship can transport 100 people to Mars, how many could it safely land near Mercury's north pole after one Hohmann-like transfer?

answered Jan 13, 2022 at 16:38

16 votes

Why are we interested in visiting the giant planets' icy moons?

answered Jan 24, 2020 at 17:22

14 votes

Why are orbits around a black hole not elliptic?

answered Feb 5 at 14:02

10 votes

What makes SpaceX's Starship so cheap?

answered Apr 22, 2020 at 17:00

6 votes

How likely are atomic bomb tests to be detectable by human-equivalent extraterrestrial life?

answered Jan 10, 2022 at 20:21

6 votes

Accepted

How many people would have to keep it a secret if the U.S. hadn't walked on the moon?

answered Oct 13, 2023 at 15:50

6 votes

Of all propulsion devices that could reach near-C speeds, which one is closest/most practical?

answered Aug 1, 2021 at 19:21

5 votes

Could a Project like Orion be built today with non nuclear weapons?

answered Sep 23 at 15:06

5 votes

Can someone explain the SN10 landing failure in layperson's terms?

answered Mar 13, 2021 at 17:01

5 votes

Accepted

Why didn't the Galileo spacecraft take an image in Jupiter's upper atmosphere?

answered Mar 19, 2020 at 15:54

4 votes

Ion Drives specific impulse somewhat of a false economy?

answered Nov 6, 2019 at 15:52

4 votes

Is the ejection of matter one way to get pushed the other way the only propulsion method we have?

answered Jun 30, 2021 at 14:05

4 votes

How do I get an astronaut to do my science in space?

answered Aug 3, 2021 at 15:15

3 votes

How obvious would an Earth-like planet be when searching for signs of life in space?

answered Jun 1, 2023 at 15:21

3 votes

How could a satellite follow Earth around the Sun while staying outside of Earth's orbit?

answered Jun 26, 2019 at 16:46

2 votes

Why is Elon Musk building the Starship first?

answered Aug 1, 2020 at 14:31

2 votes

Details about Rolls-Royce / UK Space Agency's nuclear propulsion?

answered Jan 15, 2021 at 17:29

2 votes

Commercial Sources of variable thrust Rocket Engines

answered Aug 8, 2023 at 14:32

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18 Answers

If one Starship can transport 100 people to Mars, how many could it safely land near Mercury's north pole after one Hohmann-like transfer?

Why are we interested in visiting the giant planets' icy moons?

Why are orbits around a black hole not elliptic?

What makes SpaceX's Starship so cheap?

How likely are atomic bomb tests to be detectable by human-equivalent extraterrestrial life?

How many people would have to keep it a secret if the U.S. hadn't walked on the moon?

Of all propulsion devices that could reach near-C speeds, which one is closest/most practical?

Could a Project like Orion be built today with non nuclear weapons?

Can someone explain the SN10 landing failure in layperson's terms?

Why didn't the Galileo spacecraft take an image in Jupiter's upper atmosphere?

Ion Drives specific impulse somewhat of a false economy?

Is the ejection of matter one way to get pushed the other way the only propulsion method we have?

How do I get an astronaut to do my science in space?

How obvious would an Earth-like planet be when searching for signs of life in space?

How could a satellite follow Earth around the Sun while staying outside of Earth's orbit?

Why is Elon Musk building the Starship first?

Details about Rolls-Royce / UK Space Agency's nuclear propulsion?

Commercial Sources of variable thrust Rocket Engines