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expanding universe
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Videos
Learn about space expansion and why gravity and electromagnetism are not affected when space expands
Einstein, the big bang, and the expansion of the universe
Understand the theoretical model of dark energy and the acceleration of the universe
Quizzes
Nicolaus Copernicus. Nicolas Copernicus (1473-1543) Polish astronomer. In 1543 he published, forward proof of a Heliocentric (sun centered) universe. Coloured stipple engraving published London 1802. De revolutionibus orbium coelestium libri vi.
All About Astronomy
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Galaxy clusters like Abell 2744 can act as a natural cosmic lens, magnifying light from more distant, background objects through gravity. NASA's James Webb Space Telescope may be able to detect light from the first stars in the universe if they are gravitationally lensed by such clusters. (astronomy, space exploration, galaxies)
How Fast Is the Universe Expanding?
Discover
Shah Jahan. Taj Mahal. Mughal architecture. Emperor Shah Jahan fifth Mughal Emperor (reigned 1628-1658) India, Himachal Pradesh, Basohli or Jammu and Kashmir, Mankot, circa 1690 Drawings; Opaque watercolor, gold, and ink on paper (see notes)
6 Important Mughal Emperors
African Americans demonstrating for voting rights in front of the White House as police and others watch, March 12, 1965. One sign reads, "We demand the right to vote everywhere." Voting Rights Act, civil rights.
Timeline of the American Civil Rights Movement
Orange basketball on black background and with low key lighting. Homepage 2010, arts and entertainment, history and society
The 10 Greatest Basketball Players of All Time
bird. mourning dove. pigeon and dove. Mourning Dove (Zenaida macroura) family Columbidae.
Nikola Tesla's Weird Obsession with Pigeons
Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson
Vietnam War Timeline
Data analysis of the Super Bowl's "winningest" teams, game locations, MVP winners by position, teams with the most game losses. football, sports, infographic
From Sport to Spectacle: The History of the Super Bowl
Chapter 4 pg 42 - Chapter header of The Adventures of Tom Sawyer by Mark Twain. Published in 1884 by The American Publishing Company
Periods of American Literature

expanding universe: Media

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Learn about space expansion and why gravity and electromagnetism are not affected when space expands
A brief overview of space expansion.
Video: © MinutePhysics (A Britannica Publishing Partner)
Einstein, the big bang, and the expansion of the universe
After Albert Einstein published his theory of gravity, researchers realized that...
Video: © World Science Festival (A Britannica Publishing Partner)
Understand the theoretical model of dark energy and the acceleration of the universe
Brief description of dark energy and the acceleration of the universe.
Video: © MinutePhysics (A Britannica Publishing Partner)
VIEW MORE in these related Britannica articles: