Milky Way

What force keeps the arms of the Milky Way spinning around its center?

• Friction

• Gravity

• The strong force

• Nuclear force

Tags

NGSS.HS-PS2-4

What might happen if you got too close to the center of the Milky Way galaxy?

• You would be burned up by the galaxy's brightest stars.

• You would be spun outwards toward the edge of the galaxy.

• You would be trapped in the gravitational pul of a black hole.

• You would find yourself traveling faster than the speed of light.

Tags

NGSS.HS-PS2-4

How do the stars in the halo of the Milky Way differ the stars in the arms?

• The stars in the halo are older

• The stars in the halo are brighter

• The stars in the halo are more massive

• The stars in the halo have a stronger gravitational pull

Which term best describes dark matter?

• Luminous

• Transparent

• Obvious

• Mysterious

Which choice best depicts the shape of the Milky way?

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Tags

NGSS.MS-ESS1-2

Why is our galaxy called the Milky Way?

• Because of its dense, fluid center

• It's a translation of an ancient name for "galaxy"

• Because it's relatively homogeneous

• Because it looks hazy and milk from Earth

How is the center of the Milky Way different from the arms?

• The center is fairly flat, while the arms form a bulge

• The center is spherical bulge, while the arms are relatively flat

• The cent contains stars, while the arms contain only gas, planets, and dust

• The center contains dark matter, while the the arms do not

What has to happen for a black hole to form?

• A planet must collapse inward on itself

• A galaxy must spin extremely fast around its center

• A large star or group of starts must collapse

• Two stars must collide with one another

If you were giving directions to an alien from another galaxy, how would you tell him to locate Earth?

• Tell him to visit the Orion arm

• Tell him to visit the Sagittarius arm

• Tell him to visit the Perseus arm

• Tell him to visit the central bulge

What is a galactic year?

• The time it takes the Earth to make one revolution around the sun

• The time it takes for one arm of the galaxy to move ninety degrees

• The time it takes for the sun to orbit around the center of the galaxy

• The time it takes for the moon to make one revolution around the earth