Astronomers detect a roughly spherical shock wave 50 light-years across in the plane of the Milky Way galaxy.This was most likely caused by:
A) photoionization from a very massive star.
B) the death of a massive star.
C) the death of an intermediate mass star.
D) magnetized jets during star formation.

Question

Quizplus · Accepted Answer

The detection of a roughly spherical shock wave 50 light-years across suggests that it was caused by the death of a massive star. When a massive star runs out of fuel, its core collapses and triggers a supernova explosion, which releases a shock wave that expands into the surrounding interstellar medium. This shock wave can trigger the formation of new stars and influence the dynamics of the galaxy.

Astronomers Detect a Roughly Spherical Shock Wave 50 Light-Years Across