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Astronomy Lecture 3b
Astronomy Lecture 3b

... ___ 80. ? has an orbital period of 29.461 years and a period of rotation of 10 hours, 13 minutes and 59 seconds. The average density is less than that of water. A.Saturn B.Uranus C.Pluto D.Neptune E.Jupiter ___ 81. ? is a bluish color. It is sometimes characterized by deep blue spots, like the Great ...
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... Visible light is a form of electromagnetic energy that travels in waves to which our eyes are sensitive. Sunlight may look white. However, it is actually a combination of many colors which a prism can split into the spectrum of colors. This dispersion of hues can also be observed after a rain storm, ...
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Press release - ASTRONOMY GROUP – University of St Andrews

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... The Sun and the Moon PROPERTIES OF THE MOON The Moon is about the same age as the Earth and is the fifth-largest moon in the Solar System. Theories of how it formed include: 1) It was torn out of the Earth by a collision with an asteroid; 2) It was formed elsewhere and was gravitationally captured ...
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Dialogue Concerning the Two Chief World Systems



The Dialogue Concerning the Two Chief World Systems (Dialogo sopra i due massimi sistemi del mondo) was a 1632 Italian-language book by Galileo Galilei comparing the Copernican system with the traditional Ptolemaic system. It was translated into Latin as Systema cosmicum (English: Cosmic System) in 1635 by Matthias Bernegger. The book was dedicated to Galileo's patron, Ferdinando II de' Medici, Grand Duke of Tuscany, who received the first printed copy on February 22, 1632.In the Copernican system the Earth and other planets orbit the Sun, while in the Ptolemaic system everything in the Universe circles around the Earth. The Dialogue was published in Florence under a formal license from the Inquisition. In 1633, Galileo was found to be ""vehemently suspect of heresy"" based on the book, which was then placed on the Index of Forbidden Books, from which it was not removed until 1835 (after the theories it discussed had been permitted in print in 1822). In an action that was not announced at the time, the publication of anything else he had written or ever might write was also banned.
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