What evidence suggests that small galaxies in our Local Group have undergone two or more starbursts in the past?
A)We observe several small galaxies currently undergoing massive star formation.
B)We see small galaxies in which many stars have one age and many others have another age that is billions of years older.
C)We see evidence that small galaxies in our Local Group have experienced several collisions in the past.
D)We see evidence that several small galaxies were shot out of larger galaxies in our Local Group during an age of starburst activity.
E)We do not have any evidence that galaxies in our Local Group were once starburst galaxies.

Question

Quizplus · Accepted Answer

The presence of multiple ages of stars in small galaxies suggests that they underwent starburst activity at multiple times in the past. Choices A, C, and D may suggest ongoing or past interactions, but do not necessarily support the idea of multiple starbursts. Choice E is incorrect, as there is evidence of starburst activity in some small galaxies in our Local Group.

What Evidence Suggests That Small Galaxies in Our Local Group