One astronomical method used
that provided an insight about the universe is the LIGO (the Laser
Interferometer Gravitational Wave Observatory). This method helps us detect gravitational
waves emitted by astronomical bodies. The finding of gravitational waves will
lead into understanding the behavior of other bodies that we did not know
exist. The consequences are; one, we can measure the activity between two
bodies in orbit in the universe, two, scientist can estimate the merging of two
bodies in the universe every 15 minutes by using.
It's a,b, and e (earthquakes, formation of new crust, volcanism)
Sorry I don't know good luck tho
