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Laly Garcia

on 11 June 2013

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Transcript of Astronomy

Astronomy Timeline By: Xitlhaly & Eden C30,000 BC Early people engraved patterns of lines on bones to keep track of the phases of the moon. It is important because it was one of the first times that humans were curious enough to record things happening in the skies. C1300 BC The Babylonians used a record of eclipses to see regular patterns of the eclipses. C384 BC Aristotle believed that the earth was a sphere and that it has a center This is important because most people thought that the earth was flat and you could fall of the edge of the earth C276 BC Eratosthenes made a pretty accurate measurement of earth's circumference only using time shadows in different locations 1609 Galileo used the telescope to observe the sky, although he didn't create it. This is important because it made it easier to see what is up in our skies and to record what is happening which he did. In 1964, Gordon Pettengill developed a theory about the rotation of Mercury. he used the radio telescope to theorize that the rotation of the planet was actually 59 days. It had been previously thought that Mercury's orbit takes 88 Earth days, but this discovery led to new possibilities and research. This was important because it changed the thought of Mercury's rotation and it lead to more research about it. i suck at prezis thats why m so slow._. The Arecibo telescope picked up an asteroid known as 4769 Castalia. Using radar imaging, Scott Hudson and Steven Ostro were able to develop a three-dimensional model of the peanut-shaped Castalia. 1892 The first binary pulsar was discovered using radio telescopes. A binary pulsar is a pulsar that has a white dwarf or neutron star nearby that orbits the pulsar to balance the mass and gravitational direction of the pulsar. 1974 this is important because it Binary pulsars are currently the only tools scientists have to detect evidence of gravitational waves. in 2008, Arecibo was used to detect prebiotic molecules in a starburst about 250 million light-years from Earth. Methanimine and hydrogen cyanide were discovered on Apr 220, which lies in the constellation Serpens. Arp 220 its important because Asteroids had been discovered long before radio telescope but this was the first time scientists used technology to create an image of what an asteriod looked like. Isaac Newton discovered the law of universal gravitation. Even tho Cambridge University was closed by the plague, he spent most of the next two years at his family farm making discoveries in optics. 1665-7 Edmund Halley discovers stars move through space. He found that the positions of stars change with time and explained the changes in position as due to the individual motions of stars through space. William Herschel discovers Uranus. While measuring the directions and brightnesses of stars, Herschel found a fuzzy spot that moved among the stars, Uranus, the first planet not known to ancients. Giuseppe Piazzi discovers the first known asteriod which is Ceres. The discovery of organic molecules is very important to the ongoing debate on other living life on different planets. Mercury's Orbit 1718 1781 1801 This is important because Newton discovered that gravity is the thing that holds everything in its place and it's the reson why things fall. This is important because we still look at the stars today seeing how the positions of the stars change over time. This is important because it was the first time Uranus was discovered and that meant we were closer to finding other planets like Neptune and Pluto which isn't a planet anymore. This is important because once we found this one we started to find even more and more which are in the asteriod belt This is important because Friedrich Bessel, Wilhelm Struve, Thomas Henderson measure the distances of stars. Bessel, Struve, and Henderson, working independently, almost simultaneously measured the parallaxes, and hence the distances, of nearby stars. These were the first measurements, rather than estimates, of stellar distances. 1838
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