Matter collecting together at high density due to gravity.
They change die to the nuclear reaction process of burning off of the hydrogen then helium and other elements.
All stars are formed from protostars.
The stars that were formed to make a circle on the original United States of America flag represented the Thirteen Original Colonies, therefore there were thirteen stars. Now that there are fifty states in the U.S. the flag star arrangement has changed to show fifty stars formed to make a rectangle on the top left corner of out flag.
Stars. That is how stars are formed. They form from nebulae.
Stars are formed in a nebula.
They're not formed here. They were formed in stars - mainly as they exploded.
Up today mendelevium was not identified in stars.
stars
they formed animations
explosions
No, all-stars are not formed by nebulas. All-stars are formed from clouds of gas and dust called molecular clouds, which collapse under their own gravity to form a star. Nebulas are massive clouds of dust and gas in space, where stars are born.
Yes, stars are constantly being created and destroyed. Stars can last millions or billions of years, but there are so many of them out there that it's pretty common for them to come and go.
the number of stars changed as we bought states