Supernovae

Supernova 1987a before and during the event

© AAT

A supernova explosion can be as bright as an entire galaxy.

The explosions can happen when very large stars run out of nuclear fuel and die.

The remains of the star become a neutron star or a black hole.

The Cygnus Loop Part of the Veil SNR

© NASA (HST)

Some material is blown away by the explosion. This forms a glowing cloud around the position of the supernove called a supernova remnant (or SNR).

After many millions of years, the material in the SNR will be distributed to nearby gas clouds and may eventually be used in the birth of a new star. In fact, the majority of elements in the Universe were created in the centre if stars.

In fact, it is safe to say that we are all made of stardust from long-dead stars.