Answer:
A neutron star
The process of this explosion is called super nova i think. The substances remains creates this "neutron star"
Answer:
Explanation:
When a supergiant runs out of fuel it can explode suddenly. This explosion is called a supernova after a supernova some material expands into space to form other nebulas. After a super giant explodes some material is left behind. This material may form a neutron star.
