By studying galaxies much farther away. The logic behind that is that since distances are so great in deep space and light can take billions of years to cross those distances, you can see what a galaxy looked like a billion years ago if it is located a billion light-years away. It is possible to get an idea of galaxy evolution because of that.
People also model galaxy evolution on super computers by throughing in real life parameters. While not real galaxies, if the model works then it's most probably because the parameters that have been programmed into the computer are correct and that scientists are onto something.
Scientists find about different galaxies through many ways.
1) They use the Hubble Telescope to find distance cluster of stars or other objects in cpace
2)They use through Csomic Alignment, they use cosmic lenses in otherwords
3) They use ESPO'S Very Large Telescpoe
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I don't think there is a special name for that; you can use the more general term "astronomer".
Everything and nothing.
Yes.
blah blah blah... I dont know...
cuz they are explorers
No, they don't. There is so many (beyond numbers) galaxies that it is impossible to know everything.
To know what is the life there, and if there's any other creatures or "aliens". some scientists are looking for planets with water and life on them.
No. We already know a good deal about the speed of light. Scientists study other galxies to learn how galaxies work.
They (scientists) think there are hundreds of thousands of galaxies because the universe is limitless so there may be billions of galaxies!
We know that we have observed galaxies out to as much as 14 billion light years from us in every direction, and we have never seen an end to it yet.
Because they can see them.
the answer is "first".
Yes, because scientists have found hundreds and hundreds of galaxies already and scientists say that there are more galaxies out there that they haven't found!
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