What might have made the original solar nebula begin to contract?
A)the Big Bang
B)the formation of our arm of the Milky Way
C)the shock wave from a nearby exploding star
D)interstellar magnetism generated by pulsars
E)the large amount of angular momentum in the nebula

Question

Quizplus · Accepted Answer

The shock wave from a nearby exploding star (supernova) could have provided the necessary external pressure or trigger to initiate the contraction of the original solar nebula, leading to the formation of the Solar System. This process is supported by evidence of short-lived radioactive isotopes found in meteorites, which are thought to be remnants of the early Solar System and could have been produced by nearby supernovae.

What Might Have Made the Original Solar Nebula Begin to Contract