2017初级会计职称考试《经济法基础》易考点解析
| Search type | Search syntax |
|---|---|
| Tags | [tag] |
| Exact | "words here" |
| Author |
user:1234 user:me (yours) |
| Score |
score:3 (3+) score:0 (none) |
| Answers |
answers:3 (3+) answers:0 (none) isaccepted:yes hasaccepted:no inquestion:1234 |
| Views | views:250 |
| Code | code:"if (foo != bar)" |
| Sections |
title:apples body:"apples oranges" |
| URL | url:"*.example.com" |
| Saves | in:saves |
| Status |
closed:yes duplicate:no migrated:no wiki:no |
| Types |
is:question is:answer |
| Exclude |
-[tag] -apples |
| For more details on advanced search visit our help page | |
Results tagged with orbital-mechanics
Search options not deleted
user 429
百度 近年来，杭州城研中心在杭州城市学研究理事会带领下，围绕中央实施新型城镇化战略和建设中国特色新型智库的两大决策，以打造具有国际特征、中国特点、杭州特色的城市学学派和打造“国内领先、世界一流”的城市学智库为目标，以评选、论坛、平台、课题、人才、宣传、基金、基地、培训、咨询等“十位一体”城市学研究链为路径，深化城市化研究总体格局、推进城市学智库建设，打造城市学研究，各项工作取得了显著进展。
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.
0
votes
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
98
votes
Is it possible for a moon to have a higher surface gravity than the planet it is attached to?
Given a pair of objects that are gravitationally bound to each other, they will orbit around their common barycenter (center of mass of the system). The object to be most logically deemed the moon wil …
- 18k
3
votes
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
4
votes
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
4
votes
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
votes
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
8
votes
Cheapest rocket to go to space?
Salvage 1 was a TV series launched by a pilot TV movie (Salvage) in 1979. I watched the show during its original broadcast, enjoying the escapist fun, but quite cognizant that it was pure fantasy.
Pr …
- 18k
2
votes
Apollo Missions - Travel time to moon
As already explained in other answers, essentially all of the distance is covered by unpowered flight - gaining altitude away from Earth while under the influence of Earth's gravity, the "upward" velo …
- 18k
7
votes
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
8
votes
2
answers
507
views
Could Starman get ejected from the Solar System?
This is not about a prediction of Starman's fate, although it might be interesting to find it so.
This is about any object having similar aphelion and perihelion values to Starman (Elon Musk's Tesla …
- 18k
0
votes
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
15
votes
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
14
votes
4
answers
1k
views
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
5
votes
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
6
votes
3
answers
337
views
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