If high-mass stars collapsing excites astronomers, then what do astronomers get excited about?

Answer choices:
- movements in the earth's crust
 - Earth revolving around the sun
 - earth's core
 - earthworms
 - animals
 - tectonic plates being pushed together
 - Continents drifting
 - high-mass stars collapsing

 

        high-mass stars collapsing  