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Questions tagged [orbital]

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14
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3answers
1k 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 ...
3
votes
1answer
143 views

What would be the effect of a non-periapsis and non-apoapsis prograde burn on the shape of an objects orbit?

Pretty new to orbital mechanics and this question has been bugging me. How would the shape of the orbit be affected by a prograde burn at a location that isn't the periapsis or apoapsis ? For example ...
3
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3answers
139 views

Acceleration / inertial / astrophysics

If two people are in a box (no windows) One is on the earth at 1G gravity and the other one is Accelerating in space with only the acceleration (inertial equal to 1G gravity) is there a way for the ...
1
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0answers
184 views

Orbital motion of Lissajous orbit?

Lissajous Orbit Demonstration In the demonstration, I do not get how is it possible for any object to orbit around the L2 point if there is no massive celestial object at the L2 point?
1
vote
1answer
283 views

The relationship between the altitude of an anti-radial burn on apogee

I recently conducted an experiment using Kerbal Space Program to analyze the effect of burn altitude on orbital properties. Unfortunately im a bit of a rookie when it comes to orbital dynamics so I'd ...
0
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0answers
156 views

Orbiting bolo technology viability?

I have recently read Seveneves and loved the use of certain technologies in it. Has anyone put serious study into the bolo hanglider hanger and possible viable usage of a similar technology?
11
votes
1answer
2k views

Is it illegal for a private citizen of the US to own and operate an orbital kinetic weapons platform?

Let's say someone pays for the shipping through an as yet unnamed commercial launch company. And they place something in orbit that is effectively a kinetic weapons platform. Or at least has the ...
0
votes
1answer
79 views

Can the Oberth effect cause space-time distortions?

I am making the sort of rhetorical parallel between Oberth effect that I conclude applies even to light because light is actually solid of some sort photons or gravity well of Earth/Sun/galaxy, black ...
10
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2answers
406 views

What kind of missions are US surplus ICBM's capable of launching?

It has been proposed that the US military should repurpose suborbital, nuclear weapons carrying, intercontinental ballistic missiles for civil use, like Russia and Ukraine has done since decades. How ...
3
votes
1answer
2k views

Falcon 9 g-level/acceleration profile

I want to get an idea of how long the falcon 9 rocket accelerates and at what g level. Ideally a plot of gs vs time. I see various statistics like specific impulse and thrust and weight, is there a ...
3
votes
1answer
227 views

What are the main synergies between sub-orbital and orbital space launch?

A number of companies are working on suborbital flight with Blue Origin, Virgin Galactic and XCOR being among the most recognized today. I don't ask here about what actual plans different companies ...
2
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0answers
211 views

What is the total mass of everything launched that are still in space?

Inspired by this question, total mass ever launched to orbit (this is a different question, as many of the things launched have decayed by now.) How much of it is still up there? Out of that again, ...
5
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1answer
2k views

Why wouldn't argument of periapsis always be 90?

I'm helping some middle-school students write a spacecraft simulator. As part of that, I'm trying to wrap my head around orbital mechanics today, mainly using this excellent guide: http://www....
8
votes
2answers
11k views

Would a Moon resident age differently than someone living on Earth?

Say there were a base on the Moon with people living/studying there. Would they age differently than those on earth due to a change in speed through space? Does the Moon move faster through space (...
21
votes
4answers
5k views

How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth?

How can Yuri Gagarin's Vostok 1 flight be considered to have been orbital, since he did not go all the way around Earth? According to the Wikipedia article about Vostok 1, the launch site was near ...
3
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2answers
369 views

Lunar-built Spacecraft

Years ago space settlement advocates were working out ambitious schemes for orbiting colonies housing 10,000 people. They were to be built of lunar-derived materials and would have been occupied ...
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3answers
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What replacement engine options are there for Antares?

Lots of articles out about how Orbital Sciences is talking with three vendors for a replacement for the NK-33/AJ26 engine pair currently used on the Antares booster. An article on SpaceNews notes ...