All Questions
21
questions
0
votes
1
answer
121
views
Which gravitational differences we would feel if the sun disappeared?
I would like to start by stating that I'm not a physicist, I'm purely a curious individual.
I've been speculating about the differences the loss of the sun's gravitational field would have on us and ...
- 247
2
votes
2
answers
330
views
Is there any clear and concrete proof that says the Earth is rotating and orbiting? [duplicate]
As the title states, I am wondering if there exists a clear and concrete proof that proves that the earth is revolving around the sun on an orbit, and proves that the sun is not revolving around the ...
- 168
3
votes
1
answer
77
views
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
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 ...
- 111
3
votes
4
answers
510
views
Should the centripetal force of Earth's orbit around the Sun affect a pendulum on Earth?
Lets use approximate earth angular velocity around the sun with $\omega\approx2*10^{-7}\frac{r}{s}$ and earth translation orbit radius with $r\approx1.5*10^{11}m$ we can approximate centripetal ...
- 33
21
votes
7
answers
5k
views
Finding how much time it takes for a complete Earth revolution around the Sun
Long story short, my brother made a joke about how stupid it is to celebrate the Earth making one "trip" around the Sun: New Year's Eve.
So I got curious and was wondering: how could the first ...
- 320
1
vote
1
answer
82
views
How does the Earth's radial acceleration affect it's velocity during orbit around Sun? [closed]
When the earth moves along its ellipse at $67,000mph $ it accelerates at $0.006m/s^2$ would it be correct to say it's speed at some points relatively increases by $0.006m/s$ every second
- 331
0
votes
1
answer
504
views
What's the Earth's linear acceleration component around the Sun?
The earth's centripetal acceleration around the Sun is $0.006m/s^2$ does this mean one can say the earth's acceleration when it travels(revolves) at $670,000mph$ is simply equal to its centripetal ...
- 331
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 ...
- 3,006
0
votes
1
answer
1k
views
Is the orbit of Earth currently decaying?
As we know, interplanetary space is not completely empty. This would cause a drag to Earth, spiralling it towards the sun in a long enough timescale, which appears to be what has happened for many ...
- 1,223
-1
votes
1
answer
40
views
Gravitational effect of larger solar system to Earth orbit
Let's say our solar system enters to gravitational area of a larger solar system. Does Earth's orbit of sun get affected from this case?
- 181
-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:
$$\frac{\pi}{2\sqrt{2}}\frac{r_0^{3/2}}{\sqrt{G(M+m)}}$$
...
- 4,494
4
votes
2
answers
254
views
Why is there ice at the Earth's poles? [duplicate]
I beg your pardon for such a silly question, but I've never really understood the explanation they gave in the Geography textbooks. If the slanting Sun's rays due to the Earth's axial tilt can cause ...
- 359
15
votes
4
answers
3k
views
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 ...
