All Questions
12
questions
0
votes
2
answers
48
views
Rotation of planets [duplicate]
Sun attracts earth by gravitation.
And similarly every heavenly body attracts others.
But why are they rotating? The sun is moving in ellipse in the galaxy, the earth is rotating and revolving and ...
- 101
9
votes
7
answers
5k
views
If the mass of the Earth is decreasing by sending debris in space, does its angular momentum also decrease? [duplicate]
We are sending huge amount of debris into space from earth, and also very heavy satellites and rockets, then the mass of earth must be decreasing over time.
If the mass will decrease, then ...
- 213
-5
votes
2
answers
156
views
How do astronomers explain trajectories of planets?
I'm wondering how astronomers can explain the trajectories of planets because:
planets spin, so have angular kinetic energy. Thanks to the mass-energy relationship this means space-time curvature.
...
- 19
3
votes
3
answers
804
views
Why are star systems flat but planets are spherical?
This video vaguely explains why the solar system (or other star systems and galaxies) are flat.
So, does the same argument apply to planets?
The general answer is that for a given volume, a sphere ...
- 1,804
-2
votes
2
answers
346
views
Will the Earth flatten out?
Since the rotation of the earth makes it more flat,due to the centrifugal forces, is it not possible for the force to completely flatten out earth into a plane ?
- 12.5k
5
votes
1
answer
2k
views
Why are large planets away from the Sun and smaller planets near the Sun?
In school, we are taught that every planet attracts every other.
$$F=G\frac{mM}{R^2}$$
Stars have a large gravitational force and it attracts every large object.
Every planet has a different mass ...
- 579
2
votes
3
answers
541
views
How to prove that Gravity happens in one plane?
How can we prove that an object which is orbiting another object by its gravity always moves in one plane in a full period? Not in different diffrent planes (two body system)
- 31
3
votes
2
answers
950
views
Why does this planet (J1407 b) and Saturn's ring center on its equator? [duplicate]
Why is the material in J1407 b's or Saturn's rings stay in a disk not scattered? Is it the gravity and/or magnetic field that causes this? Does it differ with other large bodies that might not have a ...
- 1
1
vote
2
answers
2k
views
What is the reason for Earth's rotation and revolution?
Is it because of the gravitational effect of the other planets and the sun then why do the other planets rotate and revolve too? And well does the Sun rotate and revolve too?
- 147
2
votes
3
answers
462
views
How did planets start to spin and do all of them spin in same direction? [duplicate]
How did planets start to spin in the first place?
Some say that gases which condense and form planets start spinning and hence planets acquire a spin. And some say that they start to spin to conserve ...
- 382
4
votes
2
answers
500
views
What is the cause of planetary rotation. Not orbital rotation [closed]
I am a senior in high school, sixteen years old. I think differently than most in my class. Recently, I have been thinking about alternative causes for the rotation of our planets. My current thought ...
- 41
2
votes
1
answer
146
views
Single plane Ring system [duplicate]
Possible Duplicate:
Why are our planets in the solar system all on the same disc/plane/layer?
I've noticed this in many pictures, Planets are shown with a single ring around them (in some ...
- 329