Copernican heliocentrism is the name given to the astronomical model developed by Nicolaus Copernicus and published in 1543. This model positioned the Sun at the center of the Universe, motionless, with Earth and the other planets orbiting around it in circular paths, modified by epicycles, and at uniform speeds.
The major features of Copernican theory are: Heavenly motions are uniform, eternal, and circular or compounded of several circles (epicycles). The center of the universe is near the Sun. Around the Sun, in order, are Mercury, Venus, the Earth and Moon, Mars, Jupiter, Saturn, and the fixed stars.
Allows calculation of planetary orbital periods around Sun. Allows geometric calculations of planetary distances from Sun. These show nice regularity: more distant planets have longer periods, move slower. Easier to calculate planetary positions than with Ptolemaic model.
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Answer:
They feared a military attack, as their military was not strong enough compared to the Western countries.
Explanation:
In general, President Abraham Lincoln appointed Ulysses S. Grant to lead the Union armies after firing other generals because "<span>C. Grant was willing to outlast the enemy even at the cost of high casualties"</span>
<span>C.Voters would elect a convention a adopt a new state constitution. </span>
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Old Immigrants Definition:
The Old Immigrants were people who reached the U.S in the early 1800s.
Here are some facts about old immigrants, their languages, where they were from, what they did for a living, etc.:
• Most of their jobs were farming and most people were farmers.
• Old immigration came in smaller numbers than new immigration.
• Old immigrates were from Northern and Western Europe.
• Most old immigrants spoke English.
• They were literate and skilled, unlike New immigrants.
