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| Most widely accepted model explaining the formation and evolution of the Solar System |
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| Model stating that the Earth is the center of the Solar System |
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| Model stating that the Sun is the center of the Solar System with the other planets revolving around it |
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| A cloud of gas and/or dust in space |
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| The Sun and the planets that orbit it make up this system |
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| The galaxy containing our Solar System |
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| A celestial body larger than an asteroid or comet |
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| Any of the Earth-like planets including Mercury, Venus, Mars, and Earth. |
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| The Jupiter-like planets including Jupiter, Saturn, Uranus, and Neptune. These planets have relatively low densities and are huge gas giants. |
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| The path of a celestial body or satellite as it revolves around another body |
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| The motion of one body about another, as Earth about the sun |
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| The spinning of a body about its axis such as Earth |
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| The North and South poles of a planet |
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| A basic unit of the geologic time scale that is a subdivision of an era |
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| Average distance from Earth to the sun measured at 150 million kilometers or 1.5 X 108 kilometers |
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| A slow motion of Earth's axis that traces out a cone over a period of 26,000 years |
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| The point where the moon is farthest from Earth |
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| The place in the orbit of a planet where the planet is farthest from the Sun |
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| The point at which the moon is closest to the Earth |
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| The point in the orbit of a planet where it is closest to the Sun |
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| A small, rocky body, which can range in sizes that usually orbit between Mars and Jupiter |
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| The luminous phenomenon observed when a meteoroid enters the Earth's atmosphere and burns up. Also known as a "shooting star" |
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| A small body of rocky and metallic pieces held together by frozen gases. Usually revolve around the sun in an elongated orbit |
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| Describes the concept of an Earth-centered universe |
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| Describes the view that the Sun is at the center of the Solar System |
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