Question

4. What evidence do scientists have that lead them to believe there is a black hole at the center of the milky way?

A) they have directly measured the gravity of the black hole.
B) they have observed the very rapid orbits of stars close to the area.
C) they have observed comets and asteroids disappearing into the area.
D) they have sent a probe into the area and it did not return.

5. About how much of the mass of the Milky way has yet to be discovered by scientists?

A) 95%
B) 70%
C) 20%
D) 5%

Answer 1

4. B They have observed the very rapid orbits of stars close to the area.

5. A. 95%

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