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Unformatted text preview: SCCC 115 Homework 4 - Due 11 October 2005 Prof. Christina Lacey R&D: 6-6, 6-11 P: 1-10, 5-4, 6-7, 6-8 R&D: 6-6: Which are the terrestrial planets/ Why are they given that name? The terrestrial planets are Mercury, Venus, Earth, and Mars. They are called terrestrial because all of these planets are similar to Earth in that they are all primarily rocky planets and all the planets share the same basic composition. R&D: 6-11 Comets generally vaporize upon striking Earth's atmosphere. How, then, do we know their composition? The ices that make up a comet become gaseous when the comet nears the Sun. Astronomers use spectrometers to analyze the EM emission from the atoms and molecules that make up the gases in the comets. Astronomers also study the reflected light from the dust contained in the comets. How the light is reflected tells astronomers about the size and composition of the dust....
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- Fall '09
- Work, Planet, SCCC, short period comet