Constellations and Galaxies

How are galaxies classified?

• Shape

• Number of stars

• Size

• Oldest to youngest

What two factors determine the types of most galaxies?

• size and number of stars

• rotation and revolution

• collisions and mergers

• black holes and supernovas

Which of these galaxies most closely resembles the Milky Way?

• 
• 
• 
• 

Tags

NGSS.MS-ESS1-2

Which direction is this galaxy rotating?

• clockwise

• counterclockwise

Tags

NGSS.MS-ESS1-2

When galaxies with billions of stars collide, the individual stars rarely crash into each other. How is this possible?

• Black holes at center act like magnets and keep them from merging.

• Their rotational speed prevents the stars from colliding.

• Galaxies are so large that individual stars are too far apart to collide.

• • Don't be silly!! Galaxies don't collide.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

What type of galaxy is the Milky Way?

• Lenticular

• Elliptical

• Spiral

• Barred Spiral

Tags

NGSS.MS-ESS1-2

What group is the Milky Way a part of?

• the local group

• the andromeda group

• the cluster group

• the orion group

The speed of stars within galaxies are much higher than what would be expected. This indicates the presence of additional mass, which we cannot see directly, exerting gravitational force. This is evidence of ...

• dark matter.

• light matter.

• black holes.

• supernovas.

Tags

NGSS.MS-ESS1-2

NGSS.MS-PS2-4

Which letter best describes the position of the Sun as it moves around the Milky Way?

• A

• B

• C

• D

Tags

NGSS.MS-ESS1-2

Our best images of the Milky Way are ....

• pictures of other galaxies we think look like our because we haven't been out of the Milky Way

• taken from the outside looking in by space probes like Voyagers and Pioneer.

• generated by arrays of radio telescopes that are compiled into one image.

• red and blue shifted as proven by the Hubble Space Telescope.

Tags

NGSS.HS-PS4-3