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Pluto (last planet) discovered by Clyde Tombaugh
  • 1. When was Pluto discovered by Clyde Tombaugh?
A) 1940
B) 1930
C) 1910
D) 1920
  • 2. Which year was Pluto reclassified from a planet to a dwarf planet?
A) 2006
B) 2015
C) 2010
D) 1999
  • 3. How many known moons does Pluto have?
A) 2
B) 5
C) 7
D) 3
  • 4. Which spacecraft conducted a flyby of Pluto in 2015?
A) New Horizons
B) Cassini
C) Voyager 2
D) Juno
  • 5. Who proposed the name 'Pluto' for the newly discovered planet?
A) Venetia Burney
B) Johannes Kepler
C) Galileo Galilei
D) Isaac Newton
  • 6. What is the rotational period of Pluto in Earth days?
A) 9.8 days
B) 2.1 days
C) 6.4 days
D) 4.5 days
  • 7. In which zodiac sign was Pluto in at the time of its discovery in 1930?
A) Gemini
B) Leo
C) Virgo
D) Cancer
  • 8. What is the largest moon of Pluto?
A) Nix
B) Styx
C) Charon
D) Hydra
  • 9. What is the composition of Pluto's atmosphere?
A) Oxygen, helium, argon
B) Carbon dioxide, water vapor, krypton
C) Nitrogen, methane, carbon monoxide
D) Hydrogen, nitrogen, sulfur dioxide
  • 10. Which scientist made predictions of a ninth planet beyond Neptune, leading to the discovery of Pluto?
A) Edwin Hubble
B) Carl Sagan
C) Percival Lowell
D) Edmund Halley
  • 11. What is the name of the region on Pluto where large amounts of nitrogen ice are found?
A) Olympus Mons
B) Mauna Kea
C) Valles Marineris
D) Sputnik Planitia
  • 12. Who discovered the first moon of Pluto, Charon?
A) Robert Burney
B) Clay Sherrod
C) James Christy
D) Audouin Dollfus
  • 13. Who discovered Pluto?
A) Albert Einstein
B) Isaac Newton
C) Galileo Galilei
D) Clyde Tombaugh
  • 14. What is the classification of Pluto?
A) Dwarf planet
B) Terrestrial planet
C) Gas giant
D) Ice giant
  • 15. What is the orbital period of Pluto?
A) 92 years
B) 4 years
C) 248 years
D) 365 days
  • 16. What is the order of Pluto's discovery in terms of its position in the solar system?
A) 9th
B) 7th
C) 10th
D) 8th
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