Imagine That Our Sun Were Magically and Suddenly Replaced by a Black

Multiple Choice

Imagine that our Sun were magically and suddenly replaced by a black hole of the same mass (1 solar mass) .What would happen to Earth in its orbit?

A) Earth would almost instantly be sucked into oblivion in the black hole.
B) Earth would orbit faster,but at the same distance.
C) Earth would slowly spiral inward until it settled into an orbit about the size of Mercury's current orbit.
D) Nothing-Earth's orbit would remain the same.