How many times more massive is the hypothetical ninth planet compared to Earth?

• 20 times

• 15 times

• 10 times

• 5 times

What everyday object is used to represent Earth in the scale model?

• A pea

• A grain of salt

• A head of a pin

• A fleck of pepper

How far away is Jupiter from the sun in the scale model?

• About 135 yards

• Two and a half football fields

• Five football fields

• Nearly eight football fields

How many football fields away is Neptune from our sun in the scale model?

• Two and a half

• Nearly eight

• Five

• Seventeen and a half

What is the significance of the pea in the scale model?

• It represents Earth

• It represents the sun

• It represents the ninth planet

• It represents Neptune

How long would it take to walk to the ninth planet in the scale model?

• 7 hours

• 5.5 hours

• 3.5 hours

• 2 hours

What does the size of the largest known star compare to in the scale model?

• A pea

• A grape

• The Empire State Building

• A soccer ball

What was the risky experiment conducted by astronomers with the Hubble telescope?

• Leaving it off for 10 days

• Pointing it at the brightest star

• Pointing it at the darkest patch of the night sky

• Pointing it directly at the sun

What does the Hubble Deep Field image primarily show?

• Planets

• Asteroids

• Stars

• Galaxies

What analogy is used to illustrate the number of stars in the universe?

• Grains of sand on a beach

• Drops of water in the ocean

• Leaves in a forest

• Blades of grass on a football field