Astronomers believe a supermassive black hole of three billion solar masses exists at the center of the giant elliptical galaxy M87. Which one of these is NOT a piece of evidence used to deduce this?

Question

Quizplus · Accepted Answer

Gravitational lensing, while a phenomenon associated with massive objects like black holes, is not specifically used to deduce the presence of a supermassive black hole in M87. It involves the bending of light from a more distant object by a massive foreground object, but it doesn't directly indicate a supermassive black hole's presence in the center of a galaxy like M87. The other options (A, B, and D) are direct observations that suggest the influence of a supermassive black hole.

Astronomers Believe a Supermassive Black Hole of Three Billion Solar