astronomy final

If I want to find a sizeable collection oF pop II stars in the Milky Way, wnere

Should 1

in a globular cluster hian above the galaxig's disk

How do astronomers measure the mass that the galaxy contains inside the orbit uf the sun?

Is they measure the distance to the center of the galaxy & the period of the suns orbit & then use kelpers zrd Law

Which of the following is evidence that the formation process of our galaxy may have included collisions with smaller neiahbor galaxies?

→ the observation of long moving streams of stars that continue to orbit througn our galavigs naio

the very strong source of radio waves at the center of our galaxy is called ...

→ Sagittarius A

Which of the following statements of the different types (shapes) of gataxies exis currect?

→ Collisions & mergers between galaxies can sometimes change their type (shape)

the population I stars in the Milky way

1. generally contain a greater percentage of heavier elements than pap II stars

2. are generally found in the disk of the galaxy

3. all of the above

Elliptical galaxy colors tend to be because they.

1. red

2. consist uf mainly old, evolved stars

1. Which of the following galaxy types has the largest range in sizes?

1. ellipticals

Cepneid variable stars & RR Lyrae stars can be used as "standard candles" to determind distances. Why is this?

→ Because their instrimic luminosities are related to their pulsation periods