1. What is the largest planet in our Solar System?
A) Earth
B) Saturn
C) Jupiter ✅
D) Mars
E) Neptune
Explanation: Jupiter is the largest planet in the Solar System by mass and volume. It’s known for its massive storms, like the Great Red Spot.
2. Which planet is known as the “Red Planet”?
A) Mercury
B) Venus
C) Mars ✅
D) Neptune
E) Uranus
Explanation: Mars is called the Red Planet because of its reddish appearance, which is due to iron oxide (rust) on its surface.
3. How long does light from the Sun take to reach Earth?
A) 2 seconds
B) 30 seconds
C) 8 minutes and 20 seconds ✅
D) 1 hour
E) Instantaneously
Explanation: Light travels from the Sun to Earth in about 8 minutes and 20 seconds, covering approximately 150 million kilometers.
4. What is the name of the first human to travel into space?
A) Neil Armstrong
B) Yuri Gagarin ✅
C) Buzz Aldrin
D) Alan Shepard
E) John Glenn
Explanation: Yuri Gagarin, a Soviet astronaut, became the first human in space on April 12, 1961.
5. What galaxy do we live in?
A) Andromeda
B) Whirlpool
C) Triangulum
D) Milky Way ✅
E) Sombrero
Explanation: Earth is located in the Milky Way galaxy, a barred spiral galaxy containing billions of stars.
6. Which moon is the largest in the Solar System?
A) Titan
B) Ganymede ✅
C) Europa
D) Callisto
E) Io
Explanation: Ganymede, a moon of Jupiter, is the largest moon in the Solar System—even larger than the planet Mercury.
7. What is a black hole?
A) A giant asteroid
B) A collapsed star with intense gravity ✅
C) A type of nebula
D) A dark planet
E) A hole in the sky
Explanation: A black hole forms when a massive star collapses under its own gravity, creating a point where not even light can escape.
8. Which planet has the most moons?
A) Earth
B) Jupiter
C) Mars
D) Saturn ✅
E) Uranus
Explanation: As of recent discoveries, Saturn has overtaken Jupiter in the number of confirmed moons—over 140!
9. What is the name of NASA’s most famous space telescope?
A) Chandra
B) Kepler
C) James Webb
D) Voyager
E) Hubble ✅
Explanation: The Hubble Space Telescope has been providing high-resolution images of the universe since its launch in 1990.
10. What is a light-year a measure of?
A) Time
B) Speed
C) Brightness
D) Distance ✅
E) Mass
Explanation: A light-year is the distance light travels in one year—about 9.46 trillion kilometers (5.88 trillion miles).
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