All Questions
Tagged with earth orbital-motion
104
questions
15
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4
answers
3k
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What would happen if the Earth was in a polar orbit around the sun?
This is a question that has been bugging me for a while now, I was wondering about the effects on the Earth if it was in different orbital situations to what it is now, and one of those was what would ...
- 161
0
votes
5
answers
398
views
Static model of the Earth motion
Believe it or not, an old man I know in 2015 still negates the Earth orbital motion around the Sun.
He believes the earth is rotating on itself and acknowledges this gives day and night on every ...
2
votes
3
answers
214
views
(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
15
votes
3
answers
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Are there any exact data about Earth's orbit?
Wikipedia says that the Earth's orbit's axis is $a=149\ 598\ 000\ \mathrm{km}$ and its eccentricity is $e=0.016\ 7086$, but if we use these values to find distance at aphelion and perihelion we get
$...
2
votes
0
answers
59
views
Different time between equinoxes
I calculated from here that there are 16 104 096 seconds between the vernal and autumnal equinox, if I made no mistake, this is some 650 592 s longer than the other half orbit.
I imagine this is due ...
user96370
3
votes
1
answer
204
views
Relativistic effects of an orbit around sun in a different direction than Earth
If I manage to orbit around the sun at the same speed but in a different direction than the earth, will I perceive the time on earth going faster or slower than my own time? And what about people on ...
- 71
2
votes
2
answers
673
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Moon Gravity Vs Earth Gravity Pull
Suppose, sometime in the future I develop an experimental superweapon capable of blowing up the entire Moon. If I used it to break the Moon into multiple pieces of varying sizes, we would then have ...
- 249
1
vote
1
answer
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What is the outward force on the Moon that makes it go in orbit rather that falling straight to the Earth? [duplicate]
So, we know that the gravity is responsible for pulling the Moon towards the Earth. But because it moves in an orbit, it makes me think that there must be a force that is causing the moon to travel in ...
- 553
2
votes
1
answer
3k
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Why doesn't the moon crash into the Earth? [duplicate]
I was searching about 'why do not moon crash to earth due to its gravity?'Then by reading physics stake exchange existing questions I came to know that its the sideways motion of the moon that keeps ...
1
vote
2
answers
746
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How long will it take before the orbit of the earth is 365 days exactly?
I understand that the number of days per year has changed throughout the history of the Earth. Apparently there were once over 400 days per trip around the sun.
How long will it take approximately ...
- 121
9
votes
2
answers
5k
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Is the Earth the center of the Solar System? [duplicate]
Alright guys, so I attracted you with the title. Now, to preface the question, I am fully aware of the work of Copernicus, as well as the concepts of Heliocentrism and Barycentric Coordinates. I have ...
- 263
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3
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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
379
views
Drift of Earth's orbit?
How much has Earth drifted (inwards or outwards) from its orbit about the sun? Or has Earth has not moved at all, compared to, say, 1000 years ago? 10,000 years ago?
2
votes
1
answer
113
views
How did the Moon survive next to the Earth since earth and Moon came into existence?
What mechanism(s) prevented the gravitational effect of the earth on the moon from shattering the moon when it was closer to the earth than the Roche Limit some 4.5 billion years ago?
- 49
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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