Featured in supernovae

The mysterious burst AT2018cow
An image of the black expanse of space, with stars and a galaxy in the middle. A single small star is circled in white.
A side by side comparison of the star Betelgeuse in January and December of 2019. The star is was dimmer in December 2019.
The Kepler supernova was spotted in 1604. Four centuries later, material from the explosion is still expanding outward at more than 20 million miles per hour.
An X-ray and optical composite image of a detonating star.
a spiral galaxy