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are you an Astrophysics Wonk?

Question 1 of 5 What object is constructed primarily of clumped together dust?

The Earth
The Sun
The Milky Way
The universe

Question 2 of 5 How big are interstellar dust grains?

The size of particles in cigarette smoke.
The size of grains of dust in your house.
The size of grains of sand.
The size of marbles.

Question 3 of 5 What percentage of the Milky Way's visible mass is in the form of dust?

25%
15%
2%
Less than 1%

Question 4 of 5 Why is it important to study interstellar dust?

It could eventually block out the Sun.
It could clog the engines of spacecraft.
It helps us determine the size of the universe.
It distorts our view of distant objects in the universe and serves as the building blocks for life.

Question 5 of 5 By what name is interstellar dust commonly called?

Comets
Cosmic grains
Cosmic asteroids
Stars

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