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17 Cards in this Set

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solar system
the system of nine planets and many smaller objects that orbit the Sun
Mercury
second smallest planet and closest to the Sun
Venus
the second planet from the sun which is smaller in size and mass to Earth
Earth
the third planet from the Sun
astronomical unit
the average distance from Earth to the Sun (150 million km)
Mars
the fourth planet from the Sun known as the red planet
Jupiter
the fifth planet from the Sun and the largest
Great Red Spot
A giant, high pressure gas storm on Jupiter
Saturn
the second largest planet and the sixth planet from the Sun
Urnaus
the seventh planet from the Sun
Neptune
usually the eight planet from the Sun
Pluto
considered to be the ninth and smallet planet
comet
a mass of frozen gasses, dust, and rock particles that oftendevelops a bright tail when it passes near the sun and is acted on by solar winds
Oort cloud
a cloud of comets surrounding the solar system beyond Pluto's orbit
meteor
a meteroid that enters Earth's atmosphere and burns up as it falls
meteorite
a meteor that does not completely burn up in Earth's atmosphere and strikes Earth
asteroid
a piece of rock similar to the material that formed into the plantes