The material at the center of a nebula clumps together as material is pulled there. This allows a star to form.
It formed the sun!!
dust, tiny rocks.
dust, tiny rocks.
the protostar
The Sun.
A dead mammal
When a nebula collapses due to gravitational forces, the center becomes denser and hotter. As the material in the center becomes more compact, the pressure and temperature increase, eventually triggering nuclear fusion reactions that sustain a star's energy. This marks the birth of a new star in the center of the collapsing nebula.
A star forms a nebula when it runs out of fuel. The star either becomes a red giant or a supergiant, then the star would be blown off into space either by expansion or explosion. The outer layers, which was released into space, would become a nebula, or sometimes a part of a larger nebula.
Polio
After a planetary nebula the oxygen in the middle will make it turn into a blackhole or neutron star.
Earth formed about 4.5 billion years ago from a cloud of gas and dust called the solar nebula. Gravity caused the nebula to collapse, forming the Sun at the center and the remaining material to clump together to form planets like Earth.
Distance to center of Milky Way: about 26,000 light-years. Distance to Orion Nebula: about 1,300 light-years.