Astronomy and Space Science Mcqs

21- Which planet rotates on its side?

A. Uranus
B. Neptune
C. Saturn
D. Jupiter

Answer : A. Uranus

22- The largest volcano in the Solar System is on Mars and is called:

A. Olympus Mons
B. Mauna Kea
C. Vesuvius
D. Mount Everest

Answer : A. Olympus Mons

23- A meteoroid becomes a meteor when:

A. It hits the Moon
B. It is in space
C. It orbits the Sun
D. It enters Earth’s atmosphere

Answer : D. It enters Earth’s atmosphere

24- The Great Red Spot is a feature on which planet?

A. Saturn
B. Jupiter
C. Mars
D. Neptune

Answer : B. Jupiter

25- Which planet has the shortest day in the Solar System?

A. Jupiter
B. Saturn
C. Mars
D. Neptune

Answer : A. Jupiter

26- The Kuiper Belt is:

A. Between Mars and Jupiter
B. Beyond Neptune
C. Around the Sun
D. Part of Earth’s orbit

Answer : B. Beyond Neptune

27- The Oort Cloud is believed to contain:

A. Comets
B. Asteroids
C. Moons
D. Gas giants

Answer : A. Comets

28- Which planet has a dense atmosphere mostly of carbon dioxide?

A. Jupiter
B. Mercury
C. Mars
D. Venus

Answer : D. Venus

29- The main component of the Sun is:

A. Carbon
B. Oxygen
C. Helium
D. Hydrogen

Answer : D. Hydrogen

30- The constellation Orion is known for:

A. Milky Way
B. Black Hole
C. North Star
D. Orion Nebula and Belt

Answer : D. Orion Nebula and Belt

31- A supernova is:

A. A planet explosion
B. A star explosion
C. A comet tail
D. A galaxy collision

Answer : B. A star explosion

32- The Milky Way is:

A. A planet
B. A star
C. A galaxy
D. A comet

Answer : C. A galaxy

33- Black holes are formed from:

A. Gas clouds
B. Supernova remnants
C. Comets
D. Asteroids

Answer : B. Supernova remnants

34- Dark matter is believed to:

A. Be visible in telescopes
B. Be part of Earth’s atmosphere
C. Emit light
D. Account for most of the universe’s mass

Answer : D. Account for most of the universe’s mass

35- The Hubble Space Telescope observes primarily in:

A. Radio waves
B. Visible, ultraviolet, and near-infrared
C. Microwave only
D. Gamma rays only

Answer : B. Visible, ultraviolet, and near-infrared

36- Saturn’s largest moon is called:

A. Titan
B. Europa
C. Ganymede
D. Callisto

Answer : A. Titan

37- Pluto is classified as a:

A. Asteroid
B. Comet
C. Dwarf planet
D. Planet

Answer : C. Dwarf planet

38- The first human in space was:

A. Yuri Gagarin
B. Neil Armstrong
C. John Glenn
D. Buzz Aldrin

Answer : A. Yuri Gagarin

39- Venus rotates:

A. Retrograde
B. Prograde
C. On its side
D. Very fast like Jupiter

Answer : A. Retrograde

40- The Sun is approximately how far from Earth?

A. 1 million km
B. 50 million km
C. 150 million km
D. 300 million km

Answer : C. 150 million km

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