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According to A Black Hole Is NOT a Hole by Carolyn Cinami DeCristofano, astronomers think a supermassive black hole is created when

radio waves travel through space to Earth.
there is too much empty space in a galaxy.
gravity causes many, many stars to collide.
a single star or planet explodes and collapses.

Respuesta :

Answer:

The correct answer for this is : When a large star collapses it forms a massive blackhole. the fourth one is the anwer..

fa3087

Answer:

D: a single star or planet explodes and collapses.

Explanation:

Trust me on this, also can I have brainiest please?

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