That depends on the original mass of the star, and how fast the star was spinning before it exploded.
A true "super-nova" will generally leave a black hole as a stellar remnant. Stars a little smaller than that will probably leave a neutron star at the center, and if it is spinning rapidly and radiating X-rays, we would call it a "pulsar".
a supernova
When the canis majoris explodes, it will create a supernova of over 30000 degrees. A supernova is a huge explosion of fire. After the supernova, a black hole will form. Black holes form when a star explodes. But it cant just be a star. It has to be a star 10x greater then our sun. The canis majoris is way bigger then just 10x. So when it explodes it will create a black hole much bigger then normal size.
supernova
A supernova.
The supernova remnant will either be a neutron star or a black hole.
A star that explodes is called a supernova.
Supernova
Supernova
Supernova
When a star explodes, it releases an immense amount of energy, creating a supernova. This explosion can outshine an entire galaxy for a short period of time. Supernovae are crucial for the formation of heavy elements and can also cause the star to collapse and form a black hole or neutron star.
Normally it is known as the supernova's progenitor star.
A supernova is when a massive star explodes. A neutron star is what can be formed after a supernova explosion. See related questions