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Celestial Bodies
8.4-1 Summarize the characteristics and movements of objects in the solar system.
Planets
Moons
SURFACE
Mercury terrestrial (rocky)
Venus
terrestrial (rocky)
Earth
terrestrial (rocky)
Mars
terrestrial (rocky)
Jupiter
gaseous
Saturn
gaseous
Uranus
gaseous
Neptune gaseous
Most are rocky with craters
Asteroids
Rocky
Comets
Nucleus (main body or head): ices
(water, methane, ammonia) and
dust
Tail:
Rocky
Meteoroids
UNIQUE CHARACTERISTICS
Retrograde orbit
Life
Color (red)
Atmospheric storm
Rings
Retrograde orbit
Rings
Titan (cryovolanoes)
Enceladus (liquid water under ice crust)
Europa (surface of water ice)
Vary in shape and size
Plasma (ion) tail points away from
Sun
Planets in sequence by size: Jupiter, Saturn, Uranus, Neptune, Earth, Venus, Mars, Mercury
MOVEMENT
Revolution around the Sun
Rotation on axis
Revolution around planet
(not all planets have a moon)
Revolution around the Sun
most in orbit between Mars and
Jupiter
some cross Earth’s orbit
Revolution around the Sun
(long narrow elliptical orbit)
In space: meteoroids
In atmosphere: meteors
On surface: meteorites
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