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seen Aug 26 at 11:07

Dec
11
comment Is there any telescope on Earth that can see the lunar rovers on the moon?
To add to @Eduardo Serra's answer, you can avoid having a 75m diameter telescope if you use interferometry between telescopes 75m apart.
Dec
11
comment How can the Earth's rotation speed up?
It is not the amount of water, but the fact that water is moving around the Antarctica and has its own angular momentum. Total angular momentum of the Earth is conserved, so if you speed the water flowing in the same direction as the planet rotates, the planet slows down.
Dec
11
comment How can the Earth's rotation speed up?
Yes, I realized the typo
Dec
11
answered Official registry of lunar placenames?
Dec
11
revised How can the Earth's rotation speed up?
Typo
Dec
11
comment How can the Earth's rotation speed up?
@Fabinout fluid bodies like Earth or a balloon filled with a mixture of water and oil will undergo changes in their mass distribution, and any mass redistribution will change rotational speed due to constant angular momentum.
Dec
11
answered How can the Earth's rotation speed up?
Dec
9
comment How would we detect an Earth doppelganger planet?
@called2voyage IF there were such a planet close enough to detect, it would be one of our Solar System, so it would have been detected long ago. We can not detect them nowadays (nor in any near future), as explained by jwenting
Dec
9
comment How to measure the altitude and azimuth of a star?
Yes, 90-alt is the Zenith distance of the star, which is precisely dec-lat (or lat-dec).
Dec
9
answered How to measure the altitude and azimuth of a star?
Dec
9
answered Is the rotation of the Sun and the rotation/orbit of the Moon around the Earth a coincidence?
Dec
9
revised How do you figure out the magnitude of stars?
Opsss... wrong numbers!
Dec
9
answered Is there a pattern between the mass of a body and the mass of orbiting objects around it?
Dec
7
awarded  Critic
Dec
7
answered What is the formula to figure out how far away a star is?
Dec
6
comment Does anyone know why three of Jupiter's largest moons orbit in 1:2:4 resonance?
en.wikipedia.org/wiki/Orbital_resonance
Dec
6
comment iteration to cover the whole sky with right ascension, declination, angle
@RobertCartaino Calculate the difference between the surface of a slice of sphere from pole to pole between two meridians and that of a rectangle which is D*sqrt(2) longer than needed. This is inside the squares only, you need to multiply for the relation among that of a circle of radius d and that of a square of side sqrt(2)*D/2.
Dec
5
comment iteration to cover the whole sky with right ascension, declination, angle
I actually gave you the formula: if the side of the square is sqrt(2)*D/2 that is exactly both RA_step and DEC_step
Dec
5
answered iteration to cover the whole sky with right ascension, declination, angle
Dec
5
answered How would we detect an Earth doppelganger planet?