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| a system of billions of stars gases and dust |
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| brilliant objects in space that may be the powerhouse of devleoping |
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| cloud of gas and dust in space |
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| a star that has swelled and glows with a red color |
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| the explosion of a star releasing huge amounts of light and other energy |
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| an invisabal object in space whose mass and gravitional force is so great that not even light can excape |
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| the idea that the universe had a huge explosion about 15 billon years ago |
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| the change of light waves from retreating objects to the red end of the spectrum |
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| a point in earths orbit around the sun where night and days are the same langth |
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| a darkening of the moon when it passes throught earths shadow |
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| the rise and fall in the ocean and seas caused mainly by the gravitational pull of the moon on earth |
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