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The Kepler spacecraft has found thousands of likely extrasolar
The Kepler spacecraft has found thousands of likely extrasolar

... “missing.” Scientists know what colors correspond to different gases from laboratory experiments on Earth. Ozone (O3), for example, absorbs light at 9.6 micrometers; carbon dioxide (CO2) absorbs radiation at 15 micrometers. To search for life, astronomers look for gases that “don’t belong” according ...
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The Ancient Heavens: Exploring the History of Astronomy
The Ancient Heavens: Exploring the History of Astronomy

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The Dynamics-Based Approach to Studying Terrestrial Exoplanets
The Dynamics-Based Approach to Studying Terrestrial Exoplanets

... (Henry et al. 2007) report 348 stars within 10 pc (as determined from trigonometric parallaxes), of which 239 are M dwarfs and only 21 are G dwarfs. Projecting these numbers by volume, we expect 10,000 M-dwarf stars within 35 pc. This estimate is consistent with the number of Mdwarfs in that volume ...
The Sun - Colina Middle School
The Sun - Colina Middle School

... 8. True/False: the conditions in the sun’s core are only slightly warmer than Earth’s temperature. 9. True/False: the sun’s core is the source of all the sun’s energy. 10. True/False: the sun produces helium through ...
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... One of the most arresting images of the twentieth century is a photo of Earthrise, taken in 1968 by a human traveler in orbit around the Moon. We have long known how precious and special our world is: Earth is the only known planet with oceans of water, with an atmosphere rich in oxygen, with life. ...
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Jupiter - Copeland Science Online

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The 4 Galilean Satelites of Jupiter!!!!

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December 2010 Clear Skies Newsletter PDF

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... significantly closer to the sun at some times of year than at others that this effect would produce seasons, but the Earth's elliptical orbit is in fact almost perfectly circular. (For some other planets the ellipticity of the orbit is an issue, but not for the Earth.) The Celestial Sphere When disc ...
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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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