Solar System Objects LET Review Questions

LET Review Questions about Solar System objects. Hopefully you have enjoyed them as much as I have enjoyed making them. What do you know about these visitors from the depths of our solar system, comets?

1. What are comets believed to be made of?
a. Hydrogen gasb. Only ice
c. Only rock
d. Mixture of ice, rock and dust

2. Who was the first person to predict the return of a comet?

a. Edmund Halley
b. Soho
c. Charles Messier
d. Catherine Herschel

3. A long period comet is a comet with a period of 200 years or more.

a. True
b. False

4. Assuming all parts are present in the comet being observed, what is the most prominent part of a comet to the unaided eye?

a. Ion Tail
b. Coma
c. Dust Tail
d. Nucleus

5. What did the ancient Greeks call comets?

a. fast moving planets
b. angels
c. falling stars
d. hairy stars

6. In the twentieth century, most comets were named using which convention?

a. After their discoverer
b. Alphabetically
c. After the nearest galaxy
d. After ancient gods

7. What was the name of the 1985 ESA mission to observe Halley's Comet?

a. Sakigake
b. Halley
c. Giotto

8. What country backed out of the mission to Halley's comet, which was originally a joint mission with ESA?

a. Russia
b. Brazil
c. Japan
d.United States

9. The 1985 mission to Comet Halley was ESA's first deep space mission.

a. True
b. False

10. The Perseid meteor shower is associated with what comet?

a. Halley
b. Swift-Tuttle
c. Encke

11. What comet was visible to the unaided eye from Earth in 1996-7?

a. Comet Hale-Bopp
b. Comet West
c. Comet Shoemaker-Levy 9
d. Comet Giacobini-Zinner

12. In what year were comets correctly recognized as members of the Solar System?

a. 1577
b. 1865
d. 1910

13. Which comet has the shortest known orbital period?

a. Comet Halley
b. Comet Borrelly
c. Comet Schwassmann-Wachmann 1
d. Comet Encke

14. Who gave Charles Messier his nickname of the Comet Ferret?

a. William Herschel
b. His friend Pierre Mechain
c. King Louis XV of France
d. Himself

15. Who proposed the "dirty snowball" theory about comets?

a. Fred Whipple
b. Maria Mitchell
c. George Hale
d. Edward Barnard

16. What comet graced Earth's skies in 1965?

a. Comet Arend-Roland
b. Comet Mrkos
c.  Comet Ikeya-Seki
d. Comet Kohoutek

17. What was the brightest comet in the 20th Century?

a. Comet Hale-Bopp
b. Comet Ikeya-Seki
c. Comet Halley
d. Comet West

18. In what year is Halley's comet scheduled to return?

a. 2052
b. 2025
c. 2061
d. 2016

19. Is Comet Halley's orbit retrograde around the Sun?

a. Yes
b. No

20. Has Comet Halley always appeared every 76 years since it was first seen?

a. Yes
b. No