All Questions
9
questions
-6
votes
1
answer
52
views
Why sun revolve around the sun ? Why cant it just rotate ? ( gravitas attraction force makes it revolve , how?) [closed]
Why the revolution ?
How General relativity theory explains it
1
vote
3
answers
87
views
The speed of an impulse transmitted along a string
A supernova explosion on the far side of the Sun ejects a mass with approximately the same mass of the Sun directly at the back side of the Sun. If this ejected mass is travelling arbitrarily close to ...
1
vote
2
answers
266
views
Lag in Direction of Earth-Sun Gravity vector
When the earth is orbiting around the sun, it experiences a force vector pulling it towards the sun, which acts as a centripetal force for its elliptical orbit. However, when the earth moves a bit ...
-1
votes
1
answer
178
views
Gravitational field of sun [closed]
Let there be a solar system without Earth.
Now what happen if we place the Earth suddenly on its actual position does the gravitational force of sun acts on it immediately because of its pre ...
5
votes
1
answer
97
views
Is the Earth orbiting an 'illusory' Sun, owing to the 'speed' of gravity? [duplicate]
We see the Sun about eight minutes after light left it. Presumably this means we are also experiencing the Sun's gravity 8 minutes after it 'left' the Sun.
So are we orbiting around the Sun we can ...
-1
votes
2
answers
69
views
Sun-path on the sky [duplicate]
We are standing on the Earth and we see Sun on the sky. We see it walking in a certain direction, with predictable moving. Earth is a spheroid, as we all know. It is circling around the Sun, and also ...
-9
votes
3
answers
1k
views
Why doesn't the earth collide with the sun in 64 years?
According to another answer on this site, the time it takes for two bodies in space to collide can be computed with the following formula:
$$\frac{\pi}{2\sqrt{2}}\frac{r_0^{3/2}}{\sqrt{G(M+m)}}$$
...
5
votes
1
answer
471
views
Could the Earth be ejected when the sun burns out?
My younger brother came home from school today and told us at the dinner table that when the sun burns out the Earth could be ejected from its orbit. Skeptical, I asked his source. He quoted his ...
0
votes
1
answer
184
views
How faster is the effect of force exerted by gravity? [duplicate]
We all know that Earth revolves around the Sun due to Gravitational force of the Sun. Also we know that it takes just over 8 minutes for the Sun's light to reach Earth.
Now let us say, hypothetically ...