A supernova is one of the most powerful and mysterious phenomena in the universe. It’s an event that occurs when a star reaches the end of its life, triggering an explosion that releases immense ...

Crab Nebula: In the third ... which beats with rhythmic precision. Known as a neutron star, it has the same mass as the Sun, but is squeezed into an ultra-dense sphere only a few miles across.

The Veil Nebula is roughly 2,400 light-years away in the constellation Cygnus. It is the remnants of a star that was roughly ... observers to observe M1 the Crab Nebula and C39 the Clown Nebula.