All Questions
9
questions
1
vote
4
answers
166
views
What's my displacement relative to my position a year ago? [closed]
Earth moves in a few different ways through the universe. Earth orbits the Sun (plus the orbit precesses), the Sun moves through the Milky Way, and the Milky Way moves through the universe.
Compared ...
- 137
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
0
votes
0
answers
250
views
A confusion between geocentric and heliocentric model [duplicate]
As per Ptolemy, he proposed firstly geocentric model and that model if one see with aspects of relativity he would find true. Here is an example how
Suppose you are in a train which is moving and you ...
0
votes
1
answer
178
views
Why is the gravitational pull equal on all sides of the Earth"?
I understand that the Earth moves through the solar system at an extremely fast rate, but a question occurred to me as I reflected on this piece of knowledge: Does the speed of the Earth traveling at ...
- 285
2
votes
4
answers
303
views
Backward jerk in Earth's frame?
When the bus starts suddenly it accelerates and we experience a backward jolt, now since the Earth is continuously accelerating through space time why don't we experience that jolt here on earth ...
- 875
12
votes
4
answers
3k
views
If we were on the Moon would Earth appear to be in motion or at rest?
If we were on the moon would earth appear stationary or would it appear to move. I think it must be stationary because moon is in sychronous rotation with earth.
- 644
10
votes
1
answer
15k
views
How to determine satellite position in J2000 from latitude, longitude and distance from Earth?
Due to my task of writing orbit prediction routines I am trying to understand the reference frames better and how to use them ( particularly for Earth orbits ).
I think I get the idea of what ECI (...
- 235
-1
votes
4
answers
506
views
Sun orbits around the Earth [duplicate]
What if somebody says that Sun orbits around the Earth and not Earth orbiting around the Sun?
What would be the consequences?
7
votes
3
answers
179
views
How to measure the effects of the orbit around the Sun?
It is well know that we can measure the spinning of the Earth with a Foucault pendulum.
But, is there a similar experiment for the orbit of the Earth around the Sun? I would like to know if we could ...
- 12.5k