Geography, 25.02.2020 05:27 emfastback8868
Process of Science: Explaining the Motions of Planets. To ancient astronomers, the motions of the Sun, the Moon, and the stars seemed fairly simple. However, the motions of the planets, which were more complicated, were harder to account for. It was a challenge for astronomers to explain the observed motions of the planets and to relate those motions to variations in planetary brightness. Part A- Two competing models attempt to explain the motions and changing brightness of the planets: Ptolemy's geocentric model and Copernicus' heliocentric model. Sort the characteristics according to whether they are part of the geocentric model, the heliocentric model, or both solar system models.
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Geography, 24.06.2019 05:30
In russia which of these challenges affects the transportation of both petroleum products and other goods? a poorly repaired roads b harsh weather and vast distances c frozen waterways d separatist movements
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Geography, 24.06.2019 11:20
What man-made lake was created by the building of the hoover dam?
Answers: 1
Geography, 24.06.2019 17:30
These two images show humid tropical and humid continental climate zones. each climate zone has a different temperature and experiences different types of seasons. in a short paragraph, choose one of these two zones and explain why it is more appealing to you. which of these zones would you rather live in?
Answers: 3
Process of Science: Explaining the Motions of Planets. To ancient astronomers, the motions of the Su...
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