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The Second Term Exam
The Second Term Exam

... Unfortunately comets do not live long once they enter the warmer part of the Solar System. Just like a snow man melts in the summer, comets melt in the Inner Solar System. Although it is the most glorious part of their lives, travelling through the inner Solar System eventually kills them. After sev ...
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Spring 2017 - Astronomers of Humboldt
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Astronomy Webquest Part 1: Life of Stars: Go to http://www.odec.ca
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... (pronounced YOOR un nus) has been revealed as a dynamic world with some of the brightest clouds in the outer solar system and 11 rings. The first planet found with the aid of a telescope, Uranus was discovered in 1781 by astronomer William Herschel. The seventh planet from the Sun is so distant that ...
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Orrery



An orrery is a mechanical model of the solar system that illustrates or predicts the relative positions and motions of the planets and moons, usually according to the heliocentric model. It may also represent the relative sizes of these bodies; but since accurate scaling is often not practical due to the actual large ratio differences, a subdued approximation may be used instead. Though the Greeks had working planetaria, the first orrery that was a planetarium of the modern era was produced in 1704, and one was presented to Charles Boyle, 4th Earl of Orrery — whence came the name. They are typically driven by a clockwork mechanism with a globe representing the Sun at the centre, and with a planet at the end of each of the arms.
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