All Questions
14
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Orbital obliquity of the Earth
Consider that we have all the orbital parameters that characterize the Earth. How would one calculate the orbital obliquity of Earth?
One could argue that since the rotation of Earth doesn't change ...
- 1,213
16
votes
6
answers
5k
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If another planet was opposite Earth, would we be able to observe it?
Imagine another Earth-sized planet, in the exact same orbit as Earth, but 180 degrees out-of-phase. In this arrangement, at all times, you would be able to draw a single straight line through space ...
- 461
3
votes
1
answer
77
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Earth is spiraling away from Sun at rate of 1.5cm per year due to mass loss of Sun? How it was calculated? [closed]
My physics teacher asked if we could calculate the rate at which Earth moves away from the Sun due to the mass loss of the Sun. It's very sensible for me to understand that Earth is spiraling away ...
- 557
-2
votes
2
answers
137
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Moon is receding from Earth approximately 4cm per year [closed]
According to the theory of relativity the universe is styled as a fabric which is depressed by a large mass and a moon, still following a straight path ever 'curves inward' toward the large mass.
Now ...
2
votes
3
answers
98
views
Will August be always summer in the northern hemisphere?
Is the Earth orbit precessing, or are there other effects which will create a shift between our calendar (day counting), and the Earth's orbit?
I imagine these effects to be small, but I'm asking for ...
- 1,221
0
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2
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1k
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Is the Moon's rotation affected by Earth's?
There is a lot written on the moon affecting the Earth's rotation but not so much the other way around.
I know that moon has its own rotation:
Tidal locking is the phenomenon by which a body has ...
- 357
1
vote
1
answer
388
views
How can I obtain the position of the Earth on the orbit for given date?
I would like to be able calculate (or at least download some time-series data of) the position of the Earth on it's orbit at given date. For my purposes, it would be sufficient to account for the ...
- 111
12
votes
4
answers
3k
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If we were on the Moon would Earth appear to be in motion or at rest?
If we were on the moon would earth appear stationary or would it appear to move. I think it must be stationary because moon is in sychronous rotation with earth.
- 644
1
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1
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98
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What is the minimum possible size for an asteroid to be able to alter Earth's orbit? [closed]
Obviously, the question as posed in the title is very incomplete. Allow me to rephrase it in more specific terms:
What are the minimum possible "combined parameters" (velocity, mass, angle of ...
15
votes
4
answers
10k
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Can the Earth leave orbit if the population of humans and other live forms increases?
I don't know a lot about physics, but this seemed like the correct place to ask my question. I apologize in advance if it is a ridiculous one.
It's actually a two part question:
If the population of ...
2
votes
3
answers
214
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(How) can we determine mid-point on Earth's orbit?
The eccentricity of earth's orbit varies with time, but at present time its eccentricity is roughly mean e (0.0167).
The position of equinoxes is far more complicated than I thought and it is not at ...
user96370
0
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3
answers
1k
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How often does the earth rotate around the common center of mass with the moon?
I could not find anywhere how long does it take for the earth to rotate around the center of mass of the earth moon system, which is located inside the earth but off-center. And does this motion have ...
user83026
0
votes
1
answer
1k
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Does the Moon have rotation about its axis?
As I understand, the Moon is following Earth's curved space. If that's the case, shouldn't the Moon have no rotation if it's tidally locked, and only appear to have rotation?
If the Earth suddenly ...
- 161
4
votes
2
answers
3k
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How does Earth carry Moon with it, if it can not force Moon to touch it by gravitational force?
Earth's gravitational force is acting on its Moon in such a way that it forces the Moon to rotate round its orbit by centripetal force and carries it while rotating round the Sun by gravitational ...
- 143