Question

What causes a supernova?

a) the collision of several small stars that forms a new giant star
b) the collapse of a giant cloud of gas and dust in a nebula
c) the expansion of a shell of gas around a star that creates a giant star
d) the collapse of the core of a high-mass stat

Answer 1

The collapse of the core of a high-mass star

Step-by-step explanation:

One type, called a “core-collapse” supernova, occurs in the last stage in the life of massive stars

Answer 2

When the pressure drops low enough in a massive star, gravity suddenly takes over and the star collapses in just seconds. This collapse produces the explosion we call a supernova. Supernovae are so powerful they create new atomic nuclei.