Question

Compared with the Population II stars in globular clusters, the Population I stars in the galactic disk are

Answer 1

Population I stars, found in the galactic disk, differ from Population II stars in globular clusters in terms of location, chemical composition, and age.

Step-by-step explanation:

Population I stars, which are found in the galactic disk, differ from Population II stars in globular clusters in several ways:

1. Location: Population I stars are only found in the disk and follow nearly circular orbits around the galactic center, while Population II stars are found in the halo and in globular clusters, with some following eccentric elliptical orbits that take them high above the galactic disk into the halo.
2. Chemical Composition: Population I stars have more heavy elements than Population II stars, which have few heavy elements.
3. Age: Population I stars are typically younger than Population II stars.

Population I stars include bright supergiant stars and main-sequence stars of high luminosity (spectral classes O and B), which are concentrated in the spiral arms, as well as members of young open star clusters.