taixyz1992 Red Army Recruit
Posts : 269 Join date : 2010-10-22
| Subject: 2006 definition of planet Thu Dec 16, 2010 8:47 am | |
| Before the discoveries of the early 21st century, astronomers had no strong need for a formal definition of a planet. With the discovery of Pluto in 1930, astronomers considered the Solar System to have nine planets, along with thousands of significantly smaller bodies such as asteroids and comets. For almost 50 years Pluto was thought to be larger than Mercury,[12][13] but with the discovery in 1978 of Pluto's moon Charon, it became possible to measure the mass of Pluto accurately and it was determined that its actual mass was much smaller than the initial estimates.[14] It was roughly one-twentieth the mass of Mercury, which made Pluto by far the smallest planet. Although it was still more than ten times as massive as the largest object in the asteroid belt, Ceres, it was one-fifth that of Earth's Moon.[15] Furthermore, having some unusual characteristics such as large orbital eccentricity and a high orbital inclination, it became evident it was a completely different kind of body from any of the other planets.[16] stamp dutyzanzibar | |
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heroisthai Komsomol Member
Posts : 188 Join date : 2010-11-21
| Subject: Re: 2006 definition of planet Fri Dec 24, 2010 2:30 pm | |
| It was roughly one-twentieth the mass of Mercury, which made Pluto by far the smallest planet. Although it was still more than ten times as massive as the largest object in the asteroid belt, Ceres, it was one-fifth that of Earth's Moon. _____________________ altium designer trainingcoffee franchise opportunity | |
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tranthuongbn New Friend
Posts : 9 Join date : 2011-01-08
| Subject: Re: 2006 definition of planet Sun Jan 09, 2011 3:55 pm | |
| The compromise consisted of six proposed constitutional amendments and four proposed Congressional resolutions. Both the House of Representatives and the Senate rejected it in 1861. It was widely perceived as making heavy concessions to the South, but perhaps the most significant aspect of it was Abraham Lincoln's immediate rejection, because he was elected on a platform that opposed the expansion of slavery. The South's reaction to his rejection paved the way for the American Civil War. There were many unpopular features of the compromise that led to its failure. It guaranteed the permanent existence of slavery in the slave states and addressed Southern demands in regard to fugitive slaves and slavery in the District of Columbia. But the heart of the compromise was the permanent reestablishment of the Missouri Compromise line: slavery would be prohibited north of the 36° 30′ parallel and guaranteed south of it. The compromise, furthermore, included a clause that it could not be repealed or amended. Medical Marijuana Dispensariesdecking | |
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heroisthai Komsomol Member
Posts : 188 Join date : 2010-11-21
| Subject: Re: 2006 definition of planet Mon Jan 10, 2011 1:20 pm | |
| There were many unpopular features of the compromise that led to its failure. It guaranteed the permanent existence of slavery in the slave states and addressed Southern demands in regard to fugitive slaves and slavery in the District of Columbia. But the heart of the compromise was the permanent reestablishment of the Missouri Compromise line: slavery would be prohibited north of the 36° 30′ parallel and guaranteed south of it. The compromise, furthermore, included a clause that it could not be repealed or amended. ___________________ charmsFish Oil Supplements | |
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