Astronomy and Space Science Mcqs 21- Which planet rotates on its side? A. UranusB. NeptuneC. SaturnD. Jupiter View Answer Answer : A. Uranus Description 22- The largest volcano in the Solar System is on Mars and is called: A. Olympus MonsB. Mauna KeaC. VesuviusD. Mount Everest View Answer Answer : A. Olympus Mons Description 23- A meteoroid becomes a meteor when: A. It hits the MoonB. It is in spaceC. It orbits the SunD. It enters Earth’s atmosphere View Answer Answer : D. It enters Earth’s atmosphere Description 24- The Great Red Spot is a feature on which planet? A. SaturnB. JupiterC. MarsD. Neptune View Answer Answer : B. Jupiter Description 25- Which planet has the shortest day in the Solar System? A. JupiterB. SaturnC. MarsD. Neptune View Answer Answer : A. Jupiter Description 26- The Kuiper Belt is: A. Between Mars and JupiterB. Beyond NeptuneC. Around the SunD. Part of Earth’s orbit View Answer Answer : B. Beyond Neptune Description 27- The Oort Cloud is believed to contain: A. CometsB. AsteroidsC. MoonsD. Gas giants View Answer Answer : A. Comets Description 28- Which planet has a dense atmosphere mostly of carbon dioxide? A. JupiterB. MercuryC. MarsD. Venus View Answer Answer : D. Venus Description 29- The main component of the Sun is: A. CarbonB. OxygenC. HeliumD. Hydrogen View Answer Answer : D. Hydrogen Description 30- The constellation Orion is known for: A. Milky WayB. Black HoleC. North StarD. Orion Nebula and Belt View Answer Answer : D. Orion Nebula and Belt Description 31- A supernova is: A. A planet explosionB. A star explosionC. A comet tailD. A galaxy collision View Answer Answer : B. A star explosion Description 32- The Milky Way is: A. A planetB. A starC. A galaxyD. A comet View Answer Answer : C. A galaxy Description 33- Black holes are formed from: A. Gas cloudsB. Supernova remnantsC. CometsD. Asteroids View Answer Answer : B. Supernova remnants Description 34- Dark matter is believed to: A. Be visible in telescopesB. Be part of Earth’s atmosphereC. Emit lightD. Account for most of the universe’s mass View Answer Answer : D. Account for most of the universe’s mass Description 35- The Hubble Space Telescope observes primarily in: A. Radio wavesB. Visible, ultraviolet, and near-infraredC. Microwave onlyD. Gamma rays only View Answer Answer : B. Visible, ultraviolet, and near-infrared Description 36- Saturn’s largest moon is called: A. TitanB. EuropaC. GanymedeD. Callisto View Answer Answer : A. Titan Description 37- Pluto is classified as a: A. AsteroidB. CometC. Dwarf planetD. Planet View Answer Answer : C. Dwarf planet Description 38- The first human in space was: A. Yuri GagarinB. Neil ArmstrongC. John GlennD. Buzz Aldrin View Answer Answer : A. Yuri Gagarin Description 39- Venus rotates: A. RetrogradeB. ProgradeC. On its sideD. Very fast like Jupiter View Answer Answer : A. Retrograde Description 40- The Sun is approximately how far from Earth? A. 1 million kmB. 50 million kmC. 150 million kmD. 300 million km View Answer Answer : C. 150 million km Description 1 2 3 4 5 6 7 8 9 10 11 12 13 14