The Sun is the closest star to Earth, providing the light and heat necessary for life.
Question 2 / 10
Which galaxy is Earth located in?
1
Andromeda
2
Milky Way
3
Sombrero
4
Black Eye
The Milky Way is a barred spiral galaxy that contains between 100 and 400 billion stars.
Question 3 / 10
What is the largest planet in our solar system?
1
Saturn
2
Neptune
3
Jupiter
4
Earth
Jupiter is more than twice as massive as all the other planets in our solar system combined.
Question 4 / 10
Which planet has the most visible and complex ring system?
1
Saturn
2
Uranus
3
Jupiter
4
Mars
Saturn's rings are made up mostly of ice particles with a smaller amount of rocky debris and dust.
Question 5 / 10
What exactly is a "Light Year"?
1
A measurement of time
2
The distance light travels in a year
3
The age of a star
4
A measure of planetary rotation
One light-year is approximately 5.88 trillion miles (9.46 trillion km).
Question 6 / 10
Who was the first human to walk on the moon?
1
Neil Armstrong
2
Buzz Aldrin
3
Yuri Gagarin
4
John Glenn
Neil Armstrong stepped onto the lunar surface on July 20, 1969, during the Apollo 11 mission.
Question 7 / 10
What is a "Black Hole"?
1
A star that turned into a planet
2
A tunnel to another universe
3
A region where gravity pulls so much light can't escape
4
A dead part of the Milky Way
Black holes are formed when massive stars collapse at the end of their life cycle.
Question 8 / 10
Which is the smallest planet in our solar system?
1
Mars
2
Venus
3
Pluto (Dwarf Planet)
4
Mercury
Mercury is only slightly larger than Earth's Moon and is the planet closest to the Sun.
Question 9 / 10
Which is the "Hottest" planet in our solar system?
1
Venus
2
Mercury
3
Sun
4
Mars
Venus is hotter than Mercury because of its thick, CO2-rich atmosphere that traps heat.
Question 10 / 10
What is the name of our closest neighboring major galaxy?
1
Sombrero
2
Andromeda
3
Triangulum
4
Large Magellanic Cloud
The Andromeda Galaxy is on a collision course with the Milky Way, expected to merge in about 4 billion years.
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Learn more: Astronomy Wonders Trivia
Astronomy combines observation, physics, and engineering. NASA's solar system portal tracks missions to Mars, Jupiter's moons, and distant Kuiper Belt objects.
Stars form in nebulae; black holes warp spacetime; exoplanet surveys suggest billions of worlds in our galaxy alone. The James Webb Space Telescope extended infrared astronomy, revealing early galaxy formation previously hidden by dust.
