Galaxies Assignment

How many stars does the Milky Way consist of?

• About 100 million stars

• About 100 billion stars

• About 100 thousand stars

• About 100 stars

What is the estimated number of galaxies in the visible universe?

• About 100 million galaxies

• About 100 billion galaxies

• About 100 thousand galaxies

• About 10 billion galaxies

What is the distance that a light-year represents?

• The distance light travels in one year at a speed of 186,000 miles per second

• The distance light travels in one year at a speed of 186,000 kilometers per second

• The distance light travels in one month at a speed of 186,000 miles per second

• The distance light travels in one day at a speed of 186,000 miles per second

What type of stars are typically found in the older star clusters in the "halo" of the Milky Way?

• Blue and bright stars

• Red and dim stars

• Yellowish and cooler stars

• Green and variable stars

What did William Herschel discover about the Milky Way?

• The Milky Way's disk consists of two major spiral arms

• The Milky Way is a flat disk of over 100 billion stars

• The Milky Way's disk is made of a stone that resembled a grindstone

• The Milky Way is the only galaxy in the universe

According to Harlow Shapley, where is the Sun located in the Milky Way?

• At the center of the Milky Way

• About 30,000 light-years away from the galactic core

• In the outer spiral arm of the Milky Way

• Outside the Milky Way

What is the thickness of the Milky Way's disk?

• 100 light-years

• 1000 light-years

• 10,000 light-years

• 100,000 light-years

What is at the very center of the Milky Way galaxy?

• A globular cluster

• A neutron star

• A supermassive black hole

• A white dwarf

How long does it take for our Sun to complete one galactic revolution?

• 25 million years

• 250 million years

• 2.5 billion years

• 25 billion years

What color are Population II stars typically?

• Red

• Blue

• Yellowish

• White