https://padlet.com/noorimane2005/yx4n11zlsejm noor abdeselam mohamed 1A 1a en-us 2017-09-30 10:21:50 UTC 2023-04-19 07:53:28 UTC hello@padlet.com https://padlet-assets.s3.amazonaws.com/icons/Planets.png noorimane2005 https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192661847 2017-09-30 10:25:11 UTC https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192661847 noorimane2005 https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192661909 In astronomy, the geocentric model is a superseded description of the universe with Earth at the centre. Under the geocentric model, the Sun, Moon, stars, and planets all circled Earth.^[1] The geocentric model served as the predominant description of the cosmos in many ancient civilizations, such as those ofAristotle and Ptolemy.]]> 2017-09-30 10:26:15 UTC https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192661909 noorimane2005 https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192662323 Heliocentric system, a cosmological model in which the Sun is assumed to lie at or near a central point (e.g., of the solar system or of the universe) while the Earth and other bodies revolve around it. In the 5th century bc the Greek philosophers Philolaus and Hicetas speculated separately that the Earth was a sphere revolving daily around some mystical “central fire” that regulated the universe. Two centuries later, Aristarchus of Samos extended this idea by proposing that the Earth and other planets moved around a definite central object, which he believed to be the Sun.

]]> 2017-09-30 10:33:21 UTC https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192662323 noorimane2005 https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192662503 2017-09-30 10:36:27 UTC https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192662503 noorimane2005 https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192663662 geocentric theory and heliocentric theory]]> 2017-09-30 10:57:11 UTC https://padlet.com/noorimane2005/yx4n11zlsejm/wish/192663662