Linked Questions

49
votes
10answers
12k views

Game for teaching basics of orbital mechanics

I am looking for a game that would be suitable for teaching basic orbital mechanics concepts to primary school students (grades 6-8). Contrary to most of the questions here asking about spaceflight ...
16
votes
8answers
10k views

Why didn't Voyager 1 and Voyager 2 crash on into Jupiter or Uranus when they approached near to these massive planets?

I was reading about gravity assist and I read that both the Voyagers used gravitational force of these planets to speed up. But I wanted to know why weren't they completely attracted by their ...
16
votes
6answers
4k views

Non-orbital takeoff and landing?

I know it is a naive question, but somehow I couldn't find where it is answered here earlier. There have been a number of questions and answers detailing how spacecraft need to achieve high orbital ...
20
votes
4answers
2k views

Why did rendezvous on Gemini 4 fail so badly?

I can't for the life of me understand why commander Jim McDivitt thought he could eyeball a rendezvous - point the nose and thrust. The futility of that technique is one of the first things even ...
10
votes
4answers
2k views

Lowest delta-v maneuver to reverse the direction of a satellite in LEO?

Part of this answer was inspired if I remember correctly from a question about how to reverse the direction of a satellite in LEO with the minimum delta-v. Whether this was the original question or ...
13
votes
3answers
5k views

Are patched conics (and by induction, KSP) "useless" for simulating ion propulsion?

My previous KSP question What can the KSP game actually teach about spaceflight and orbital mechanics, and what are its limitations? resulted in some really productive discussions and under-the-hood ...
2
votes
3answers
2k views

My height is 5 feet and weight is 55 kg. Can I be a NASA astronaut?

My dream is to be a NASA astronaut. I am a 16 year old girl from India, my height is currently 5 feet, and my weight is 55kg. Can my height and weight create problems in fulfilling my dream?
44
votes
2answers
40k views

How realistic is Kerbal Space Program?

Kerbal Space Program is an independent spaceflight simulation game, which has become quickly popular due to being (kind of) precise at simulating actual spaceflights. But how precisely? How close is ...
22
votes
2answers
2k views

Going from LEO to lunar using only low-thrust ion propulsion - can it be done?

@SF.'s question What are the parameters of the new Iodine electrical rocket engine developed by RSC Energia? links to the short RT article 'Ten times cheaper': Russian space company testing iodine ...
8
votes
2answers
444 views

How can debris from an impact escape to a stable orbit?

Please help me understand: As far as I understand it, when an object gets thrown off the surface of a planet by an impact and doesn't reach escape velocity it is on a suborbital trajectory and ...
6
votes
2answers
2k views

Does Kerbal Space Program have a software migration path to Lagrange points, halo orbits, and other 3-body goodies?

At about 05:37 in Scott Manley video Kerbal Space Program 2 - What We Know About The Sequel So I’m cautiously optimistic and I really obviously want this to be ...
5
votes
2answers
1k views

Calculating the planets and moons based on Newtons's gravitational force

I am trying to understand how to calculate the orbits of solar system bodies in an n-body framework, based on the pair-wise gravitational interaction between the objects. At present, I am considering ...
3
votes
2answers
899 views

The "Em Drive" paper is out - need some help understanding it

Scott Manley tells us (see Engadget also) that the reaction-less drive peer reviewed paper is out, and nicely explains the basics. If it works, it would violate the long-held belief that linear ...
12
votes
1answer
9k views

Rocket Engine Plumbing: Still don't understand the Full Flow Staged Combustion Cycle

I just found this incredible video KSP Doesn't Teach: Rocket Engine Plumbing and ran through it a few times. It's very helpful in the way it outlines the various issues first, and then designs the ...
1
vote
1answer
169 views

What exactly the orbit accuracy requirement in KSP missions and contracts, and how is it mathematically defined and implemented? [closed]

When playing e.g. the Rosetta mission in Kerbal Space Program (KSP), one of the things one can achieve is called Orbit Accuracy. Unfortunately, after searching KSP's forums and Wiki I still can not ...