1. How far is Pluto from the Sun? 8.3 billion kilometers 4.5 billion kilometers 5.9 billion kilometers 6.7 billion kilometers

2. What is Pluto's mass? .34 times that of Earth .5 times that of Earth .0022 times that of Earth .01 times that of Earth

3. What is Pluto's density? 2.03 that of water 6.7 that of water 5.4 that of water 8.9 that of water

4. Pluto is never closer to the Sun than Neptune. True False

5. What is the rotation of Pluto? 28 Earth days 1 Earth day 6.3 Earth days 365 Earth days

6. How many satellites is Pluto known to have? None Five Two Three

7. Where was Pluto discovered? Mt. Palomar in California Mauna Kea in Hawaii Kitt Peak observatory in Arizona Lowell observatory in Arizona

8. Who discovered Pluto? Clyde Tombaugh Percival Lowell Gerard Kuiper James Flamsteed

9. In what year will Pluto complete one orbit since its discovery? 2010 2178 2426 1930

10. What god was Pluto named for? Underworld Charon A Dog Acheron

11. What is the axial tilt of Pluto? 10 degrees 122 degrees 75 degrees 45 degrees

12. Before its reclassificationP, Pluto was regarded as the smallest planet. True False

13. Pluto actually resides in the Kuiper belt. True False

14. What is the average distance between Pluto and Charon? 19,640 kilometers 28,500 kilometers 1,650 kilometers 45,400 kilometers

15. The center of gravity between Pluto and Charon is below the surface of Pluto. True False

16. Pluto is the outermost boundary of the Solar System. True False

17. Who discovered Charon? James Christy Hubble Space Telescope Clyde Tombaugh Edwin Hubble

18. Eclipsing Charon from Pluto would require a ___________ held at arm's length. small marble tennis ball billiard ball basket ball

19. Pluto reflects ____________ percent of the light it receives from the Sun. 23 16 47 78

20. Has the Hubble Space Telescope ever been able to photograph both Pluto and Charon? Yes No