Which sequence of formation in our Galaxy by age is correct, oldest to youngest?
A)dark nebulae, planetary nebulae, emission nebulae
B)spiral arms, bulge, halo
C)halo, spiral arms, globular clusters
D)globular clusters, emission nebulae, open clusters
E)Population I stars, Population II stars, Population III stars

Question

Quizplus · Accepted Answer

Globular clusters are among the oldest objects in the Milky Way, formed early in the Galaxy's history. Emission nebulae are regions of ionized gas that illuminate when young, hot stars form within them, indicating a more recent formation. Open clusters are groups of young stars that have recently formed from the same molecular cloud, making them the youngest in the sequence.

Which Sequence of Formation in Our Galaxy by Age Is