Planets by ismail demir https://padlet.com/ismail35demir47/d5fmj7pjolbi Made with an open mind en-us 2016-11-23 16:45:28 UTC 2023-05-13 08:35:10 UTC hello@padlet.com Planets ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139630002 2016-11-23 17:12:51 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139630002 Scientific ideas are developed through reasoning and tested against observations. A scaled view of the worlds of our solar system. Defining the term planet is important, because such definitions reflect our understanding of the origins, architecture, and evolution of our solar system. The ancient Greeks counted the Earth's moon and sun as planets along with Mercury, Venus, Mars, Jupiter, and Saturn. Earth was not considered a planet, but rather was thought to be the central object around which all the other celestial objects orbited. It wasn't until the 16th century that the idea was revived by Nicolaus Copernicus. By the 17th century, astronomers (aided by the invention of the telescope) realized that the sun was the celestial object around which all the planets - including Earth - orbit, and that the moon is not a planet, but a satellite (moon) of Earth. Uranus was added as a planet in 1781 and Neptune was discovered in 1846.Ceres was discovered between Mars and Jupiter in 1801 and originally classified as a planet. But as many more objects were subsequently found in the same region, it was realized that Ceres was the first of a class of similar objects that were eventually termed asteroids (star-like) or minor planets.Pluto, discovered in 1930, was identified as the ninth planet. But Pluto is much smaller than Mercury and is even smaller than some of the planetary moons. It is unlike the terrestrial planets (Mercury, Venus, Earth, Mars), or the gas giants (Jupiter, Saturn), or the ice giants (Uranus, Neptune). Charon, its huge satellite, is nearly half the size of Pluto and shares Pluto's orbit. Though Pluto kept its planetary status through the 1980s, things began to change in the 1990s with some new discoverie ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139631156 2016-11-23 17:19:37 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139631156 ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632139 2016-11-23 17:23:15 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632139 ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632169 2016-11-23 17:23:23 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632169 What is Planet? ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632364 2016-11-23 17:24:43 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632364 What is a Planet? ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632952 2016-11-23 17:28:28 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139632952 ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139633655 What is a Planet ?]]> 2016-11-23 17:32:28 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139633655 ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139634267 2016-11-23 17:35:55 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139634267 ismail35demir47 https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139634299 2016-11-23 17:36:06 UTC https://padlet.com/ismail35demir47/d5fmj7pjolbi/wish/139634299