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A black hole is a region of spacetime where gravity is so strong that nothing, not even light, can escape it. Learn about the history of the concept, the predictions of general relativity, the different types of black holes and how they are observed and studied.
Sagittarius A* is a compact and bright radio source near the border of Sagittarius and Scorpius constellations, with a mass of 4.297 million solar masses. It was discovered in 1974 and imaged in 2022 by the Event Horizon Telescope, confirming it to be a black hole.
A table of supermassive black holes (SMBHs) with known masses, measured in solar masses, in various galaxies. The list includes the theoretical limit of 2.7 × 1011 M☉, the largest black hole candidate Phoenix A, and the most massive black hole in the Milky Way, Sagittarius A*.
Black is an achromatic color that results from the absence of light. Learn about its etymology, associations, cultural meanings, and artistic uses from prehistoric times to the present.
In 1940, three lynchings of Black men by whites (no KKK affiliation is known) took place in the South: Elbert Williams was the first NAACP member known to be killed for civil rights activities: he was murdered in Brownsville, Tennessee, for working to register Black people to vote, and several other activists were run out of town; Jesse ...
Condoleezza Rice is an American diplomat and political scientist who served as the 19th U.S. national security advisor from 2001 to 2005 under President George W. Bush. She also served as the 66th U.S. secretary of state and the director of the Hoover Institution at Stanford University.
Emmett Till was born to Mamie and Louis Till on July 25, 1941, in Chicago. Emmett's mother, Mamie, was born in the small Delta town of Webb, Mississippi.The Delta region encompasses the large, multi-county area of northwestern Mississippi in the watershed of the Yazoo and Mississippi rivers.
The article explores the historical and scholarly debates over the racial identity of the ancient Egyptians and their culture. It covers the different views and sources from the 18th to the 20th century, and the challenges to the mainstream position that Egypt was not a black or white civilization.
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