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17 Cards in this Set
- Front
- Back
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Astronomical Unit |
a unit of measurement used in astronomy equal to the distance from the earth to the sun |
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Big Bang Theory |
theory that states that the formation and expansion of the universe resulted from an initial explosion. |
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Electromagnetic Spectrum |
the range of electromagnetic waves placed in order of increasing frequency and decreasing wave length. |
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Galaxy |
a collection of stars held together by gravity. |
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Hertzspring Russel Diagram |
a graph of stars, luminosity and temperature/color. |
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Illuminated |
a word used to describe an object that can be seen because it reflects light. |
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Light Year |
the distance light travels in one year. |
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luminosity |
the amount of light an object emits or gives off. |
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Milky Way Galaxy |
the galaxy we live in that contains our sun and planets. |
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Moon Phase |
any portion of the illuminated moon visible from earth during a month. |
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Neap Tide |
weak tides that occur during the quarter moon phase. |
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Revolve |
to orbit a central point. |
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Rotate |
to turn on an axis. |
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Spectro Scope |
an instrument used to view the different colors of light produced by different sources.
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Spring Tide |
strong tides that occur during the full and new moon |
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Tides |
the rise and fall of large bodies of water due to the pull of gravity. |
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Visible Light |
the small portion of electromagnetic rotation that humans can go with the unaided eye. |
