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Results tagged with orbital-mechanics
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user 429
百度 早年担任侍御史时期,对朝政有很多建议和陈奏,也会针对唐中宗的一些举措积极进谏。
Orbital mechanics (also called astrodynamics) is the application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft on an orbital or escape trajectory. For the movements of celestial bodies, use [celestial-mechanics], not this.
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Orbital mechanics: trying to understand counterintuitive behavior (braking to overtake)
For perfectly circular orbits, the further out you are, the slower your angular and linear velocity, which is why Mercury is moving the fastest.
Where it gets counter-intuitive is the overtake scena …
- 18k
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3
answers
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Has anything ever executed an orbit change such as between ISS and Hubble?
ISS and Hubble have vastly different orbits - different altitudes, different inclinations, requiring a massive delta-V to transfer from one to the other. My question is: has anything ever had to perfo …
- 18k
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Is it theoretically possible to dispose of the larger pieces of space junk into the Sun?
Theoretically, yes. Practically, I think it would depend on the object's orbit.
Some satellites are de-orbited when they reach the end of their useful life, causing them to descend into the atmospher …
- 18k
0
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Why is geosynchronous orbit an altitude, rather than a velocity?
There is no magical number 22,000.
If, as you say, you could achieve geostationary orbit at any altitude, then you could go to any location on Earth's equator, hold an object at arm's length, releas …
- 18k
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Why does the ISS track appear to be sinusoidal?
Bear in mind that the orientation of an axis of rotation or of an orbit is essentially fixed in space. This means that there is a fixed relationship between the ISS orbit and the Earth's polar axis. I …
- 18k
14
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Was the Apollo spacecraft always gravitationally bound to the Earth-Moon system?
When the Apollo spacecraft was en route to the Moon, was it an escape trajectory from the Earth-Moon system? If not for the burn(s) to enter lunar orbit, would it have continued in an independent sola …
- 18k
28
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Why did the rendezvous attempt fail on Gemini 4?
This is more of a physics question, but here goes:
Both the piloted spacecraft and the rendezvous target are objects each in their own orbit, even though they may be separated by minimal distance and …
- 18k
15
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Traveling in a circle while in orbit
Could this best be achieved by placing the satellite in a solar orbit with the same period as the earth, only 400 km above the pole?
No. At least, not without it continuously applying thrust agai …
- 18k
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Why did Saturn V not head straight to the moon?
Some key points to consider:
The longer you are applying thrust against gravity, the more fuel you require.
An orbit is an orbit; low-Earth orbits, the Moon's path around Earth (or more correctly, t …
- 18k
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How does a Spacecraft change its orbit?
To simplify the explanation and terminology, let's consider the case of a spacecraft orbiting Earth.
All orbits are elliptical, with the center of mass of the system (Earth, in our example) at one fo …
- 18k
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Why does launching east result in an orbital inclination equal to the latitude of the launch...
Another way to look at it:
Consider an object orbiting Earth at some inclination relative to the equator. Now consider its path projected onto Earth's surface. If you plot that path as latitude vs lo …
- 18k
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How is foot-pounds of energy defined?
Foot-pound or pound-foot are synonymous, and represent the arithmetic product of pound (force) and foot (length).
The pound (force) is the weight of one pound (mass) at the Earth's surface (somewhat …
- 18k
3
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Would a self-winding watch work in space without gravity?
The escapement (the part that actually measures time) uses a spring and balance wheel so it will operate the same way no matter the presence or absence of linear acceleration in any direction. There i …
- 18k
3
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What is the distance of the Sun-Jupiter L4 and L5 points relative to Jupiter?
According to this, L4 and L5 for Sun-Jupiter will each be at the same distance from Jupiter as Jupiter is from the Sun (something like 780,000,000 km).
- 18k
7
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Does the International Space Station get TV?
Can the ISS get the new digital air TV or satellite TV...
As far as Digital over the air TV is concerned, it's the same as old-fashioned TV in that both are transmitted from terrestrial transmit …
- 18k