Question: How are stars formed?

Christopher Phillips answered on 20 Jun 2011:

Stars are formed when huge clouds of hydrogen gas come together and heat up. When they get hot enough they burst into life in a nuclear explosion. This is when a star is born.
You can see some of these clouds when you look up at the night sky on a clear night.
Look for a band of ghostly light right above your head, it goes from one side of the sky to the other. This is the Milky Way, our galaxy. When you look at it you are looking at huge clouds of gas where new stars, new solar systems are born. 🙂 It was in a place like that 4.6 Billion years ago where our su was born 🙂