Astronomy Earth and Moon 4

Total Flash Cards » 60
 
1. 

1 Only one asteroid is classified as a dwarf planet: ________ .

 

Ceres

 
2. 

2 The Damacloid minor planets orbit ________ .

 

in the vicinity of the Gas Giant planets

 
3. 

3 While some MP Groups are general categories, Hirayama Groups ________ .

 

share similarity in some proper orbital elements

 
4. 

4 Although quite varied, all comets have relatively large ________ .

 

eccentricities

 
5. 

5 The Oort Cloud Objects originally formed in the vicinity of ________ .

 

the Gas Giant planets

 
6. 

6 The LaGrange points were developed using Jupiter-based data, but will exist in any system of a pair of orbiting bodies.

 

true

 
7. 

7 Rocky meteorites are classified into ________ sub-types.

 

three

 
8. 

8 The Ring Systems of the Jovian planets ________ .

 

all exist within the Roche Limit for their host planet, except Saturn's "E" ring

 
9. 

9 What is unique about Mars' moon, Phobos?

 

it rises in the west and sets in the east

 
10. 

10 Uranus and Neptune originally formed ________ .

 

closer to the sun than their present positions

 
11. 

11 Coma material blown away from the comet by the Solar Wind creates ________ .

 

a dust and ion tail

 
12. 

12 Which of the LaGrange points are most stable?

 

L4 and L5

 
13. 

13 What orbit parameter value will increase the likelihood of a planet to have quasi-satellites?

 

A low eccentricity value

 
14. 

14 A planet near opposition will set at about ________ .

 

sunrise

 
15. 

15 Who first proposed the existance of proto-planetary material beyond the orbit of Neptune?

 

Kenneth Edgeworth

 
16. 

16 The Jupiter Trojans exist at Lagrange points ________ .

 

L4 and L5

 
17. 

17 What is the best evidence that Neptune's moon, Triton, is a captured planetary embryo?

 

Triton's orbit has a very high eccentricity

 
18. 

18 One ________ of all known TNOs are Plutinos

 

third

 
19. 

19 The largest TNO known is ________ .

 

Eris

 
20. 

20 The Oort Cloud contains material that ________ .

 

are slightly thermally processed small objects

 
21. 

21 What International Astronomical Union function was maintained at the University of Cincinnati?

 

The minor planet center

 
22. 

22 Most Comets will eventually ________ .

 

completely sublimate

 
23. 

23 A common characteristic of the LaGrange points is that they ________ .

 

all orbit the primary body in the system at the same angular velocity

 
24. 

24 The Oort Cloud objects originally formed in the vicinity of ________ .

 

Uranus and Neptune

 
25. 

25 Quasi-satellites ________ .

 

orbit the Sun

 
26. 

26 Which star hosts the first Exo-Planet discovered?

 

51 Pegasi

 
27. 

27 Which planet reaches opposition more frequently?

 

Saturn

 
28. 

28 Why is there so much interest in Jupiter's moon Europa and Saturn's moon Enceladus?

 

they are known to have liquid water oceans below their icy crusts

 
29. 

29 Most comets are believed to come from nearby stars.

 

wrong: true members of the solar system

 
30. 

30 A proper orbit element is an osculating orbit element with ________ removed.

 

cyclical perturbations

 
31. 

31 While most meteors come from ________ , most meteorites come from ________ .

 

comets; the asteroid belts

 
32. 

32 Meteor showers are associated with ________ .

 

comets

 
33. 

33 Tails of comets are ________ .

 

dust and gas blown off the comet's coma by the Solar Wind

 
34. 

34 Most meteors are caused by small bits of debris scattered from comets.

 

true

 
35. 

35 The rarest kind of rocky meteorite is ________ meteorite.

 

a Carbonaceous Chondrite

 
36. 

36 Ceres is the only asteroid to attain ________ .

 

hydrostatic equilibrium

 
37. 

37 The dust tails of comets point ________ .

 

away from the sun

 
38. 

38 The Radiant of a Meteor Shower will rise ________ .

 

around midnight

 
39. 

39 The ________ are a stony type of meteorite that has never been subjected to very much heat.

 

carbonaceous chondrites

 
40. 

40 How many gravitational equilibrium points did Joseph Louis LaGrange calculate there to be in a two body system?

 

Five

 
41. 

41 Most meteorites originate from ________ .

 

the asteroid belts

 
42. 

42 A meteorite can be ________ .

 

held in your hand

 
43. 

43 The size of the typical rocky mass encountering the earth, causing a meteor is about ________ .

 

the size of a small grain of sand

 
44. 

44 Where did the Oort Cloud objects get their angular momentum?

 

from Uranus and Neptune

 
45. 

45 The Kuiper Belt is the presumed source for ________ .

 

Short-period Comets

 
46. 

46 The coma of a comet is created through the process of ________ .

 

sublimation

 
47. 

47 How far is the classical Roche limit from the center of a planet?

 

2.44 planet radii

 
48. 

48 Meteors are ________ .

 

glowing columns of gas in the atmosphere

 
49. 

49 The Solar Wind ________ .

 

is made of small particles

 
50. 

50 The first minor planet was discovered in ________ .

 

1801

 
51. 

51 Only one asteroid gets bright enough to be seen by the naked eye: ________ .

 

Vesta

 
52. 

52 The Sun contains ________ of the mass of the entire solar system.

 

99.86%

 
53. 

53 The quasi-satellites ________ .

 

have stable orbits

 
54. 

54 How many embryo-sized moons are there in the Solar System?

 

seven

 
55. 

55 Ceres, the largest asteroid, contains ________ of all the mass in the asteroid belts.

 

33%

 
56. 

56 The ________ minor planet group(s) can cross the Earth's orbit.

 

Aten, Amor, and the Apollo

 
57. 

57 The first minor planet discovered was ________ .

 

Ceres

 
58. 

58 What is most interesting about Gliese 581d?

 

It may have liquid H20 on its surface

 
59. 

59 Objects that orbit the sun with an orbit period in a 2:3 resonance with that of Neptune are called ________ .

 

Plutinos

 
60. 

60 The asteroids that lie in two swarms 60 degrees ahead of and behind Jupiter are the ________ asteroids.

 

Trojan