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sunspot
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Study the zoomed-in view of a large sunspot group taken by the Helioseismic and Magnetic Imager, March 29, 2010
sunspot group Galileo Galilei: sunspots sunspot active region of the Sun photosphere of the Sun average yearly sunspot numbers sunspot drawings Diagram of sunspot observations made by Johannes Hevelius, 1647.
Observe a close-up of a rotating sunspot
Quizzes
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
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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Title: Senate Square, St. Petersburg, December 14, 1825: repression of the troop mutiny - watercolor by Carl Ivanovitch Kollman, 1825 depicts Decembrist uprising clashing with cavalry, with spectators watching. (new style December 26, 1825) Europe. Saint
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Photos and Videos

sunspot group
Galileo Galilei: sunspots
sunspot
active region of the Sun
photosphere of the Sun
average yearly sunspot numbers
sunspot drawings
Diagram of sunspot observations made by Johannes Hevelius, 1647.
Study the zoomed-in view of a large sunspot group taken by the Helioseismic and Magnetic Imager, March 29, 2010
Observe a close-up of a rotating sunspot
Study the magnetic fields in a sunspot pair as observed by the Helioseismic Magnetic Imager, March 29, 2010
See All Videos and Images →

Related Topics and References

Topics
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Key People

Galileo
Galileo
Italian philosopher, astronomer and mathematician
George Ellery Hale
American astronomer
Maria Mitchell
Maria Mitchell
American astronomer
Lockyer
Sir Joseph Norman Lockyer
British astronomer
Richard Christopher Carrington
British astronomer
Seth Barnes Nicholson
American astronomer
Johannes Fabricius
Dutch astronomer

Related Quizzes and Features

Quiz
The orbits of the planets and other elements of the solar system, including asteroids, Kuiper belt, Oort cloud, comet
Space Odyssey
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
View of the Andromeda Galaxy (Messier 31, M31).
Astronomy and Space Quiz