All Questions
33
questions
-6
votes
1
answer
50
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
0
votes
1
answer
60
views
Clear explanation of acceleration of the earth
The Earth rotates with an angular velocity of $\omega$.
My questions:
Is the angular acceleration of the Earth equal to $0$ because angular velocity is stable?
What is the difference between angular ...
- 17
1
vote
0
answers
20
views
If the liquid internal parts of the Earth solidify, what will be the consequences?
Will the Earth's radius just decrease, the daytime decrease, and the magnetic field seize to exist?
2
votes
2
answers
127
views
Can we prove the Earth rotation with a disk mounted in its center on a frictionless axis?
Can somebody prove the rotation of Earth if it places an uniform disk with a hole in its the center on an axis and orient it paralelly to Sun ecliptical disk?Just assure himself that the disk on the ...
- 2,245
2
votes
1
answer
397
views
How big (in meters) could the difference be between ECI and ECEF coordinates at midnight UTC?
Is the only difference due to leap seconds, etc. or other differences between UTC and updated forms of universal time, such as UT1? In other words, are all earth-centered inertial (ECI) coordinate ...
- 145
2
votes
4
answers
2k
views
Change of direction of rotation with change of perspective
Take an apple. Rotate it around its vertical axis to the right (relative to you). If you look at it from above (your head above the apple) and take a point there while the apple is rotating, you will ...
- 97
3
votes
1
answer
1k
views
Will an object dropped from a high building displace due to the Earth's rotation?
I read that in the 16th and 17th century, the question of whether the Earth rotates around its axis or all celestial bodies rotate around it was extensively debated. One of the anti-rotation arguments ...
- 433
1
vote
1
answer
76
views
Earth rotation with atmosphere
Note: This might be a very dumb question
Considering Earth's rotation on its axis, I was thinking it made sense for the outer sides of the Earth to have a significantly higher tangential speed, ...
- 53
5
votes
2
answers
3k
views
Why doesn't Foucault's pendulum show Earth's spin at the equator but works at the North/South poles
If you where directly above the North/South pole and set up Foucault's pendulum, why does it show the Earth's spin even though the Earth isn't spinning there? This is also where it takes the shortest ...
- 359
-2
votes
2
answers
160
views
Day/Year Length Of Larger, but same mass, Earth? [closed]
I’m wondering how the length of a day and year would change on Earth if it was twice as big, but the same mass (less density)?
Also, would such a difference cause it to orbit closer or further from ...
- 107
0
votes
1
answer
344
views
Why is 24h (angle) equivalent to 360°?
Why is 24h (angle) equivalent to 360°? The earth does not spin 360° in 24h.
When giving astronomical coordinates, my GCSE study guide says right ascension is measured in hours where 24h right ...
- 331
40
votes
3
answers
10k
views
Why wouldn't the part of the Earth facing the Sun a half year before be facing away from it now at noon?
The Earth takes 24 hours to spin around its own axis and 365 days to spin around the Sun. So in approximately half a year the Earth will have spun around its axis 182.5 times.
Now take a look at the ...
- 555
0
votes
4
answers
1k
views
Why is Earth rotating along $x$(day and night) and $y$(tilt, causing seasons) axis, but not along the $z$ axis (taking $z$ as the axis along orbital)?
I have read this:
http://en.wikipedia.org/wiki/Axial_tilt
It is obvious that the rotation of any planet is a combination of rotation along three axis x,y,z.
Lets take the z axis as the one being the ...
- 29k
1
vote
0
answers
55
views
What is the mass of rotation of Earth? [closed]
This question means "what is the additional mass which Earth has due to its rotational kinetic energy and mass-energy equivalence, as opposed to hypothetical non-rotating Earth"?
How could I ...
4
votes
6
answers
6k
views
Air flight and Earth's rotation
I read a response asking why flights of equal distance east and west take roughly the same time (disregarding wind actions). I have trouble visualizing part of the answer; "the speed of the rotation ...
- 53