Author Question: Imagine that our Sun were magically and suddenly replaced by a black hole of the same mass (1 solar ... (Read 83 times)

RYAN BANYAN · **on:** Jul 27, 2018

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) Nothing; Earth's orbit would remain the same.
C) Earth would slowly spiral inward until it settled into an orbit about the size of Mercury's current orbit.
D) Earth would orbit faster, but at the same distance.

Question 2

In Ptolemy's geocentric model, the normal eastward motion of the planets was along

A) a retrograde loop.
B) a deferent.
C) the equant.
D) an epicycle.
E) an ellipse.