Size of the Universe

How long would it take a standard commercial airliner to travel around Earth's circumference?

• 24 hours

• 45 hours

• 72 hours

• 100 hours

How many Earths can approximately fit inside the Sun?

• 13,000

• 130,000

• 1,300,000

• 13,000,000

What is the approximate distance between Earth and the Sun, also known as 1 Astronomical Unit (AU)?

• 9.3 million miles

• 93 million miles

• 930 million miles

• 9.3 billion miles

What is the estimated distance of the Oort Cloud's outer edge from the Sun in Astronomical Units (AU)?

• 5,000 AU

• 10,000 AU

• 50,000 AU

• 100,000 AU

If the solar system were represented by MetLife Stadium in New Jersey, where would the outer edge of the Oort Cloud lie?

• Within the stadium's parking lot.

• Just outside the stadium walls.

• Further than Philadelphia.

• Within the state of New Jersey.

If our solar system (from the Sun to Neptune) were the size of a US quarter, what would the approximate size of the Milky Way galaxy be?

• A football field.

• The state of New Jersey.

• The entire United States.

• The continent of North America.

How does Sirius A compare to our Sun in terms of mass and radius?

• Sirius A has half the mass and half the radius of the Sun.

• Sirius A has double the mass and 1.7 times the radius of the Sun.

• Sirius A has the same mass but a larger radius than the Sun.

• Sirius A has a larger mass but a smaller radius than the Sun.

If UY Scuti were to replace our Sun in the solar system, how far would its photosphere extend?

• Beyond the orbit of Mars.

• Beyond the orbit of Earth.

• Beyond the orbit of Jupiter.

• Beyond the orbit of Saturn.

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What are the two largest galaxies in the Local Group?

• Milky Way and Triangulum Galaxy

• Andromeda and Triangulum Galaxy

• Milky Way and Andromeda

• Virgo Cluster and Milky Way