Review: Milky Way Galaxy

Our "hometown" is a vast, flat, disk-shaped collection of gas, dust, and stars called ___

• the Milky Way Galaxy

• the Andromeda Galaxy

How far is it across the Milky Way Galaxy?

• 1,000 light years across

• 100,000 light years across

How many stars are in the Milky Way Galaxy?

• hundreds of billions

• hundreds of millions

Galaxies are colossal collections of stars, gas & dust held together by _____.

• space/time

• gravity

• black holes

• dark matter

Tags

NGSS.HS-PS2-1

NGSS.HS-PS2-4

Younger stars that orbit the galactic bulge are located in the

• galactic bulge.

• galactic disk.

The area of the galaxy that has the most dense stars surrounding a supermassive black hole.

• Halo region

• galactic bulge

The area where faint, old stars exists that surrounds the disk & bulge.

• galactic bulge

• Halo region

Globular clusters exist in this region just outside of the galaxy.

• galactic disk

• Halo region

Tags

NGSS.HS-ESS1-3

Our Sun and solar system are located

• near the galactic bulge.

• about 2/3 from the center of the Milky Way.

The Sun takes about ____ million years to orbit the galaxy once (or a galactic year).

• 225

• 425

Tags

NGSS.HS-ESS1-4