What is a galaxy?

 If you look at the night sky, you can see clusters of stars fighting between countless stars. These are called galaxies. It could contain millions, even billions, of stars. Some galaxies are very large with more than billions of stars, while others are smaller with millions of stars. Even the smallest galaxy is so large that it takes millions of light years to get to any corner. These galaxies are, in fact, billions of years old There were clouds moving. During the process of rotation, their shape was formed and stars were formed. This process of rotation is still going on and new stars keep forming and old ones keep breaking all the time. It is so far away that its light reaches the earth 500,000 years later, that is, we can say that if we look at Andromeda, it is as if we are looking at Andromeda, which is 500,000 years old. The transmitting light went from there 500,000 years ago. Our galaxy is also part of a galaxy, and our galaxy is called the Milky Way. This galaxy is so large that it would take one million light-years to reach one end of it, meaning that a human being would travel in a spaceship that travels at the speed of light and at the speed of light exactly one million years. If he travels in alignment, then he will be able to reach the last part of the "national way" by going somewhere. Imagine if only our galaxy was so big then the rest of the galaxies and then the whole universe would be so big.