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Jan
14
answered Where can I find good places to watch stars?
Jan
14
answered Could dark matter particles be unstable?
Jan
14
answered what is the highest throughput astronomy project in pixels?
Jan
13
comment Can you identify this telescope in a desert?
This is no "30cm" as the OP said
Jan
13
comment Can you identify this telescope in a desert?
Could you provide more information like location, etc?
Jan
10
answered apparent size of an astronomical body
Jan
10
answered Why can we sometimes see the moon during the day?
Jan
10
comment Why are planets spherical?
Also related (and partially answered there): astronomy.stackexchange.com/questions/917/…
Jan
10
answered What's the largest non-spherical astronomical object in the universe?
Jan
6
comment Could something temporarily break the Moon's tidal lock?
Hi @Walter, but it is not. At least, not completely random, as the density is not the same on the "seas" face of the Moon and the other one.
Jan
4
answered Could something temporarily break the Moon's tidal lock?
Jan
4
answered Latest sunrise/earliest sunset out of phase with solstice?
Jan
4
answered What is the physical, geometric shape of the universe?
Dec
20
revised What was the length of year 1 million years back?
Decoupling happens for all bouded objects, not our galaxy alone.
Dec
20
suggested approved edit on What was the length of year 1 million years back?
Dec
20
answered Did a piece of Halley's comet strike the Earth 1,500 years ago?
Dec
19
comment What was the length of year 1 million years back?
@FrancescoMontesano please make an answer from that
Dec
19
answered What can we expect from the first accurate image of a black hole?
Dec
18
comment What was the length of year 1 million years back?
I am not sure than the space "slipping under Earth's feet" would move it farther from the Sun, being Earth gravitationally bounded to Sun. If this were true, we should see expansion inside galaxies by comparing far (thus old) galaxies with near (thus recent) ones, and I have no notice of that.
Dec
16
comment If the hammer and feather move at the same speed why do comet and the tail particles move at different speeds?
It is negligible compared to the solar wind itself, as you point out, but not compared to the comet's movement.