Astronomy Earth and Moon 4

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1 Only one asteroid is classified as a dwarf planet: ________ .
Ceres
2 The Damacloid minor planets orbit ________ .
in the vicinity of the Gas Giant planets
3 While some MP Groups are general categories, Hirayama Groups ________ .
share similarity in some proper orbital elements
4 Although quite varied, all comets have relatively large ________ .
eccentricities
5 The Oort Cloud Objects originally formed in the vicinity of ________ .
the Gas Giant planets
6 The LaGrange points were developed using Jupiter-based data, but will exist in any system of a pair of orbiting bodies.
true
7 Rocky meteorites are classified into ________ sub-types.
three
8 The Ring Systems of the Jovian planets ________ .
all exist within the Roche Limit for their host planet, except Saturn's "E" ring
9 What is unique about Mars' moon, Phobos?
it rises in the west and sets in the east
10 Uranus and Neptune originally formed ________ .
closer to the sun than their present positions
11 Coma material blown away from the comet by the Solar Wind creates ________ .
a dust and ion tail
12 Which of the LaGrange points are most stable?
L4 and L5
13 What orbit parameter value will increase the likelihood of a planet to have quasi-satellites?
A low eccentricity value
14 A planet near opposition will set at about ________ .
sunrise
15 Who first proposed the existance of proto-planetary material beyond the orbit of Neptune?
Kenneth Edgeworth
16 The Jupiter Trojans exist at Lagrange points ________ .
L4 and L5
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 One ________ of all known TNOs are Plutinos
third
19 The largest TNO known is ________ .
Eris
20 The Oort Cloud contains material that ________ .
are slightly thermally processed small objects
21 What International Astronomical Union function was maintained at the University of Cincinnati?
The minor planet center
22 Most Comets will eventually ________ .
completely sublimate
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 The Oort Cloud objects originally formed in the vicinity of ________ .
Uranus and Neptune
25 Quasi-satellites ________ .
orbit the Sun
26 Which star hosts the first Exo-Planet discovered?
51 Pegasi
27 Which planet reaches opposition more frequently?
Saturn
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 Most comets are believed to come from nearby stars.
wrong: true members of the solar system
30 A proper orbit element is an osculating orbit element with ________ removed.
cyclical perturbations
31 While most meteors come from ________ , most meteorites come from ________ .
comets; the asteroid belts
32 Meteor showers are associated with ________ .
comets
33 Tails of comets are ________ .
dust and gas blown off the comet's coma by the Solar Wind
34 Most meteors are caused by small bits of debris scattered from comets.
true
35 The rarest kind of rocky meteorite is ________ meteorite.
a Carbonaceous Chondrite
36 Ceres is the only asteroid to attain ________ .
hydrostatic equilibrium
37 The dust tails of comets point ________ .
away from the sun
38 The Radiant of a Meteor Shower will rise ________ .
around midnight
39 The ________ are a stony type of meteorite that has never been subjected to very much heat.
carbonaceous chondrites
40 How many gravitational equilibrium points did Joseph Louis LaGrange calculate there to be in a two body system?
Five
41 Most meteorites originate from ________ .
the asteroid belts
42 A meteorite can be ________ .
held in your hand
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 Where did the Oort Cloud objects get their angular momentum?
from Uranus and Neptune
45 The Kuiper Belt is the presumed source for ________ .
Short-period Comets
46 The coma of a comet is created through the process of ________ .
sublimation
47 How far is the classical Roche limit from the center of a planet?
2.44 planet radii
48 Meteors are ________ .
glowing columns of gas in the atmosphere
49 The Solar Wind ________ .
is made of small particles
50 The first minor planet was discovered in ________ .
1801
51 Only one asteroid gets bright enough to be seen by the naked eye: ________ .
Vesta
52 The Sun contains ________ of the mass of the entire solar system.
99.86%
53 The quasi-satellites ________ .
have stable orbits
54 How many embryo-sized moons are there in the Solar System?
seven
55 Ceres, the largest asteroid, contains ________ of all the mass in the asteroid belts.
33%
56 The ________ minor planet group(s) can cross the Earth's orbit.
Aten, Amor, and the Apollo
57 The first minor planet discovered was ________ .
Ceres
58 What is most interesting about Gliese 581d?
It may have liquid H20 on its surface
59 Objects that orbit the sun with an orbit period in a 2:3 resonance with that of Neptune are called ________ .
Plutinos
60 The asteroids that lie in two swarms 60 degrees ahead of and behind Jupiter are the ________ asteroids.
Trojan