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4 Cards in this Set
- Front
- Back
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The Solar System consists of...
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The sun, the planets, their satellites(moons), & asteroids; and comets. The sun contains more that 99% of the mass(amount of matter) in the solar system, & all the other celestial bodies revolve around it, held by the force of gravity.
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There are 8 planets...
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Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, & Neptune.
Mercury, Venus, Earth, & Mars are called the INNER PLANETS because they are so close to the sun. They are all small rocky planets. Jupiter, Saturn, Uranus, & Pluto are called the OUTER PLANETS because of their greater distance from the sun. The Outer planets are gas giants. |
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Earth's Surface
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70% water. It is the only celestial body on which life is known to exist.
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Moon
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•5th largest satellite in the solar system.
• Has no atmosphere, but does have surface ice which was discover in 1998. •The moon revolves around the Earth once every 27 days. • During the lunar month, the moon appears to go through a series of phases. The cycle of phases take approximately 29 days. •U.S. astronauts landed on the moon in several missions from 1962 to 1972. |
