Yes. In fact most of what we see of other galaxies is the stars. Galaxies are millions or billions of stars, and each one is a different shape. But in general they tend to be spiral, eliptical (like a squashed circle), lenticular (shaped like a lentil!) or irregular.
Most definitely, yes! There are stars in lots of different galaxies. Galaxies exist because they contain millions and millions of stars. Stars are the most important bit of any galaxy!!
Yes, other galaxies have as many stars as our own galaxy, and sometimes even more. There are galaxies that have up to a 100 times more stars than our own in fact.
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Deeps 2005 commented on :
Imagine there are irregular shaped stars in our galaxy!