The Official String Theory Web Site:--> Cosmology :--> The Big Bang :--> Hydrogen makes first stars

Hydrogen gas makes first stars

Content on this page requires a newer version of Adobe Flash Player.

Get Adobe Flash player


Previous | Next

TIME: one billion years

. Now that the radiation has cooled and decoupled from the matter, and almost all the electrons are bound up to nuclei in hydrogen, helium and lithium atoms, gravitational forces become important. Small fluctuations in the matter density and gravitational field begin to grow and coalesce. Hydrogen gas is pulled together by gravity until the force causes the gas to collapse and ignite through hydrogen fusion to form the first stars.


How old is the Universe? // Structure of the Universe // The Big Bang // Before the Big Bang? // What about string theory?


home/ basics/ math/ experiment/ cosmology/ black holes/ people/ history/ theatre/ links/ blog/