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Hace 1 día · Astrodynamics. In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, describe the orbits of planets around the Sun. The laws modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary.
Hace 4 días · During the 1983–2005 Second Sudanese Civil War, people were taken into slavery. [12] Evidence emerged in the late 1990s of systematic child slavery and trafficking on cacao plantations in West Africa. [13] Slavery in the 21st century continues and generates an estimated $150 billion in annual profits. [14]
Hace 4 días · A group of enslaved Africans arrived in the English Virginia Colony in 1619, marking the beginning of slavery in the colonial history of the United States; by 1776, roughly 20% of the British North American population was of African descent, both free and enslaved.
20 de abr. de 2024 · Jamestown Colony, first permanent English settlement in North America, located near present-day Williamsburg, Virginia. Established on May 14, 1607, the colony gave England its first foothold in the European competition for the New World, which had been dominated by the Spanish since the voyages of Christopher Columbus in the late 15th century.
20 de abr. de 2024 · By the end of the 1670s, black slaves began to replace both white indentured servants and native Americans held as slaves as Virginians’ primary source of labor. As the number of slaves grew, the Virginia Assembly began to specify the difference between slaves and servants, on what basis someone could be enslaved, and the conditions and ...
15 de abr. de 2024 · Robert Rich, 2nd earl of Warwick (born June? 1587—died April 19, 1658, London, Eng.) was an English colonial administrator and advocate of religious toleration in the North American Colonies.
11 de abr. de 2024 · Calvert was educated at Trinity College, Oxford (B.A., 1597), and became secretary to Robert Cecil, afterward earl of Salisbury. Calvert served in the House of Commons from 1609 to 1611. He was knighted in 1617, became a secretary of state in 1619, and was given a pension in 1620.
