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26 Cards in this Set

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Define solar system.
The sun and all that orbits the sun.
Define the sun.
A spectral type G2 main sequence star at the center of the solar system.
About 99.8% of the solar system's mass is where?
Sun
Major bodies orbiting the sun.
Planets
What group of planets are close to the sun?
Terrestrial
What group of planets are small in size and have a low mass?
Terrestrial
What group of planets have a high density?
Terrestrial
What group of planets are far from the sun?
Jovian
What group of planets are large in size and high in mass?
Jovian
What group of planets have a low density?
Jovian
Natural satellites of planets.
Moons
About how many moons are in the solar system?
>100
Small rocky and metallic bodies that orbit the sun.
Asteroids
Astroids orbiting the sun between Mars and Jupiter in a disk-like distribution.
Astroid belt
Small icy and rocky body that orbits the sun.
Comets
What appears "fuzzy" near the sun as ice turns to vapor?
Comets
The source of short period comets.
Kuiper Belt
The source of long period comets.
Oort Cloud
What objects orbit near the sun's equator?
planets, asteroids, and Kuiper belt
How old is the Solar System?
4.56 billion years old
What is the Solar Nebula Theory?
The sun, planets, moons, asteroids, and comets formed about the same time and from the same material. (solar nebula)
What is one key step in planet building?
(a)
A. Small particles stick together to form larger particles by processes of condensation/accretion.
What is one key step in planet building?
(b)
B. Planet building must begin early.
Iron and rock condense at...?
high and low temperature
Ices condense at..?
low temperatures
Composition of the Solar Nebula.
3/4 hydrogen
1/4 helium
2% heavier element