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| a system of billions of stars, gases, and dust[image] |
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| brilliant objects in space that may be the powerhouses of developing galaxies[image] |
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| cloud of gas and dust in space [image] |
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| a star that has swelled and glows with a red color[image] |
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| the explosion of a star, releasing huge amounts of light and other energy [image] |
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| an invisible object in space whose mass and gravitational force is so great that not even light can escape.[image] |
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| the idea that the universe started a huge explosion about 15 billion years ago.[image] |
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| a point in earths orbit around the sun where daylight is either the longest or the shortest amount possibe. |
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| a pointin the earths orbit around the sun where nghts and days are the same length. |
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| a darkening of the moon when it passes through Earths shadow. |
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| the rise and fall of water in the ocean and seas caused mainly by the gravitational pull of the moon on Earth. |
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