Hi guys !!
just had a query...Please answer it ↓
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☞ Galaxies look stationary, so why do scientists say that they rotate?
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Answers
Answer:
Because...
Explanation:
It looks like it's moving because if a mass is extremely huge, it looks like it is moving or rotating from a long distance.
Answer:
gii
Explanation:
Through a GOOD telescope, watch Jupiter for at least 2 hours. You WILL notice it spinning. It completes a rotation in 10 hours, and it has enough detail on it that you can tell it's spinning.
On a clear night, go outside and find a one or two bright stars. Note their position relative to something nearby, a tree or a roof, from the position where you are standing. Repeat the observation an hour later from the same position. You will notice that the stars have moved. Either the earth is spinning or the entire universe is spinning around the earth once every 24 hours. But for the nearest star to revolve around the earth in 24 hours, it would have to exceed lightspeed, clearly impossible. Therefore Earth rotates.
Galaxies rotate…on the order of a couple hundred million years. But as previously mentioned, if they did not rotate they would collapse into a supermassive black hole.
gud nyt