All Questions
25
questions
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2
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How to calculate equilibrium height of tidal bulge?
I am trying to model the shape of the tidal bulge caused by the moon.
I asked GPT for a formula and it gave me equilibrium tidal bulge height as
$$\frac{2 R_{earth} G M_{moon}}{3 r^3 \Delta g}$$
and ...
- 5,148
2
votes
1
answer
69
views
On the tidal heating of a moon. What is the second Love number?
Years ago it was asked here how to calculate the tidal heating of a moon orbiting another body with a simple equation. The answer is very detailed. They explain the equation, its shortcomings, the ...
1
vote
2
answers
377
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Correct explanation of tides [duplicate]
In the explanation of tides on earth there seem to be different versions for the second water bulge on the side opposite to the moon, while everybody seems to agree that the bulge on the moon side is ...
- 4,292
-1
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1
answer
78
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How does a gas giant planet hold it's spherical shape when it has tidally locked rotation in it's orbit around the Sun?
How does a gas giant planet hold its spherical shape when it has a tidally locked rotation in its orbit around its Sun? Wouldn't it fall apart without its gravitational pull from the rotation? How ...
6
votes
2
answers
2k
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Possible non-negligible physical effects that relate planetary/lunar geometry and seismic activity such as earthquakes?
Could any forces from the moon, the planets or the sun in orbit hypothetically influence seismic events on earth? And if yes how to approximately calculate and compare the magnitude of the forces?
...
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33
votes
6
answers
7k
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Does bottle water rise a little bit on full moon days?
High tides and low tides are caused by the Moon. The Moon's
gravitational pull generates something called the tidal force. The
tidal force causes Earth—and its water—to bulge out on the side
closest ...
user218113
1
vote
0
answers
76
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Is a planet hot inside because it is still hot from beginning, or continuously heated? [duplicate]
If a planet emerges from multiple colliding pieces, that causes its material heat up.
Later, an existing planet is continuously heated by radioactive decay, tidal forces and other effects.
But are ...
- 3,901
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1
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65
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Is it physically possible the existence of moons or planets where objects float permanently above the surface?
I found the following exercise while studying gravitation:
A small moon of mass $m$ and radius orbits a planet of mass M, keeping the same face towards the planet. Show that, if the moon approaches ...
- 493
3
votes
5
answers
1k
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How the moon takes energy from Earth (if at all)?
At least twice (on the comments of this answer, and mentioned in passing on this book), I have read that the moon takes energy from Earth due to tidal drag. The notion seems that: a) energy must ...
- 979
2
votes
2
answers
240
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Tidal forces between Moon and Earth
I started studying about gravitation recently and I came across the fact that when finding the gravitational force between the earth and some point mass in space, we can consider the mass of the earth ...
- 167
0
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1
answer
464
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What are Love numbers and what is the Moon-Earth tidal quality factor?
I need to find the quality factor (ie. $Q = \frac{\text{energy stored}}{\text{energy dissipated per cycle}}$) associated to the Moon orbiting around the Earth. Looking around for this, lead me to the ...
- 914
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0
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Are the high tides always more unequal when the centre of gravity is within a planet?
In case of our high tides at both sides of the Earth it seems that they are almost equal. But is there a slight difference because the center of gravity is about 1,700 km below the surface of the ...
- 3,348
1
vote
2
answers
453
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Do tidal forces affect the poles?
In many tidal forces illustrations it seems like the poles (with respect to the satellite's rotation) are drawn towards the center of the body.
I can't understand why that is.
Is it because the body ...
- 113
4
votes
1
answer
713
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Would the Star Wars Death Star in a low Earth orbit be torn apart by Earth's gravity?
I got the question from this reddit comment:
Well the moon is a quarter million miles from earth. The death star would only need to be in low earth orbit to stay aloft (which according to Wiki is ...
- 497
2
votes
2
answers
320
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How deep does a gravity well need to be to remove particles from a planetary body?
I almost considered asking this question on WorldBuilding, however I wanted the brute mathematics on the subject, so please excuse the theoretical nature of this question.
I understand the basic ...
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