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parallax
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stellar distances Change of parallactic angle with altitude. Measurement of parallax by observations from a northern and a southern observatory. Stellar parallax. binocular and instantaneous parallax
For Students
parallax summary
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?
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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.
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King Cobra snake in Malaysia. (reptile)
9 of the World’s Deadliest Snakes
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parallax: Related Content

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Photos

stellar distances
Change of parallactic angle with altitude.
Measurement of parallax by observations from a northern and a southern observatory.
Stellar parallax.
binocular and instantaneous parallax
See All Images →

Related Topics and References

Topics

Key People

Frank Schlesinger
American astronomer
Gill, Sir David
Sir David Gill
Scottish astronomer
Jean Richer
French astronomer
Thomas Henderson
Scottish astronomer

Related Quizzes and Features

Quiz
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