Dark Matter

What kind of matter makes up you and me and all we can see?

• Special Matter

• Normal Matter

• Dark Matter

• Light Matter

Tags

NGSS.MS-PS1-1

What did Kepler figure out about planets back in the 1600s?

• The further away from the Sun it was the faster it was moving

• All planets move the same speed no matter how far away from the Sun they are

• The closer a planet was to the Sun the slower it was moving

• The further away from the Sun it was the slower it was moving

By being able to measure the Sun's gravity Newton was able to calculate the Sun's what?

• Temperature

• Diameter

• Luminosity

• Mass

How do astronomers measure how fast a galaxy is spinning?

• Infrared Waves

• It's centripetal force

• It's Doppler Shift

• It's centrifugal force

What was happening with the velocities of the objects furthest away from the center of the galaxy?

• They were moving faster

• They were moving slower as predicted

So what did this mean for the gravity in the galaxy?

• It was strongest at the outer edges

• It was focused in the center as you would expect

• It was constant throughout the galaxy

How much invisible material must there be compared to the visible material to get the rotational graph right?

• 3 or 4 times less

• 5 or 6 times less

• 3 or 4 times more

• 5 or 6 times more

What is the name of this invisible material?

• Normal Matter

• Dark Stuff

• Light Material

• Dark Matter

What is an Axion?

• A predicted (but never seen) sub-atomic particle

• A particle emitted from Black Holes.

• A sub-atomic particle found in Red Super Giants

• Neutron Star particles

Axions are like electrons an have no mass.

• True

• False