Supernova
what is a supernova?
a massive explosion in which a star becomes very bright and gives off most of its mass
what is a black hole?
A black hole is a place in space where gravity pulls so much that even light can not get out.
what causes a supernova?
When the pressure drops low enough in a massive star, gravity suddenly takes over and the star collapses in just seconds
what causes a black hole?
A supernova.
what comes after a supernova?
(2 answers)
a dense core and hot gas called a nebula. When stars are especially large, the core collapses into a black hole.
what comes after a black hole?
matter will be torn apart into its smallest subatomic components and eventually be squeezed into the singularity.
what can stop a supernova?
Conversion of hydrogen atoms into helium atoms
what destroys a black hole?
Black holes evaporate.
how long does a supernova last?
A few million years for the star to die, less than a quarter of a second for its core to collapse, a few hours for the shockwave to reach the surface of the star, a few months to brighten, and then just a few years to fade away.
how long does a black hole last?
for eternity.