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What are stars made of? Astronomy, physics

By | 2017-10-14T16:41:05+00:00 August 19th, 2017|Physics|

The sun from space The earliest stars probably formed only a few hundred thousand years after the Big Bang that started the universe - maybe about 13.5 billion years ago. Stars are the oldest big objects in the Universe. Stars formed big clumps of hydrogen and a few helium atoms, the simplest kinds of atoms, and [...]

Big bang – Space science – Physics

By | 2017-10-14T15:13:30+00:00 August 17th, 2017|Physics, When|

Inside stars (like our Sun) there are fusion reactions. Stars got started after the Big Bang. The Big Bang was the very beginning of our Universe, and it probably happened about 13.73 billion years ago, because that's how old the oldest stars are, and we think that stars began to form almost immediately after the Big Bang. Nobody [...]