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Space Station Glossary C
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Carbonaceous Chondrite:
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A meteorite with entrenched pebble-sized granules that hold significant quantities of organic (complex carbon-rich) matter.
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Celestial Sphere:
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An imaginary sphere adjacent the Earth, which represents the sky. Astronomers diagram the sky by the celestial coordinates of the sphere to place objects in the cosmos.
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Chemical Evolution:
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The chemical (i.e., pre-biological) changes that distorted simple atoms and molecules into the additional multifaceted chemicals wanted for the origin of life.
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Chromospheres:
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The center layer of the solar atmosphere between the photosphere and the corona. The chromospheres are approximately 10,000 kilometers (6,200 miles) thick and are calm primarily of hydrogen. It varies in hotness from below 10,000 Kelvin (18,000° F) to over 100,000 Kelvin (180,000° F).
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