Why do we see stars together in the galaxy, what is the science behind it?

Why do we see stars together in the galaxy, what is the science behind it?

If you live in a city like Delhi, you will hardly be able to see stars at night. But if you live in a hilly area, then at night you will not only be able to see the stars, but sometimes you can also see the Milky Way. Apart from this, you can also see the galaxy in the pictures taken by NASA or ISRO. If you look at these pictures, you will see that the stars are visible together. For example, the stars are very close to each other.…

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