stars become either a white dwarf, a neutron, or a black whole

because red dwarfs take so long to consume their fuel

are commonly found in binary systems as well as clusters

it no longer has any fuel to burn

it is still very hot and has a small luminosity

radiative cooling and neutrino cooling

is when the star radiates its excess heat into space

gamma rays pass near electrons and produce neutrinos which leave fast 

the smallest and denses stars in the known universe

of giant stars that exploded as a supernova

magnetic fields between 10^8 and 10^15

2x10^11 times stronger than on earth

only extremely massive stars become black holes

if they are in a binary system and take mass from other stars

when the star collapses, that nothing can stop it

is so strong that even light cant escape

that it occupies zero space and creates a singularity

becomes part of the singularity's mass and is compressed within