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| Consists of all spaceand the matter space contains. |
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| Is the study of all physical objects beyond earth. |
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| The time required for the earth to revole once around the sun. |
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| Is roughly the amount of time required for the moon to revole once around the earth. |
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| Is the time required for the earth to rotate once on its axis. |
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| 140ce, was a greek astronomer that developed the theory that earth was at the center of the universe and the sun and other planets revolved around the earth. |
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| 1553,was a polish astronomer who published a new theory that the sun was the center of the universe and the planets revolved around the sun in circular paths. |
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| Robert wilson and Arno penzias |
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| An instrument that collects light and concertrates it for beter observation. |
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| Telescope with 2 lenses that allows the viewer to see millions of stars. |
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| Telescope that uses a set of lenses to gather and focus light. |
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| Use curve mirrors to gather and focus light; this type of telescope is the most widely used by astronomers. |
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| Electromagnetic radiation |
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| All forms of energy that travel through space as waves. |
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| is all of the wavelengths of electromagnetic radiation. most of which is invisble to our eyes. |
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| Is equal to the distance that light travels through space in 1 year. |
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| The study of the origin, structure, and future of the universe. |
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