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colour–magnitude diagram
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Introduction References & Edit History
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Hertzsprung-Russell diagram
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1 July 2002: The Solar and Heliospheric Observatory (SOHO) satellite reveals a massive solar eruption more than 30 times the Earth's diameter. The eruption formed when a loop of a magnetic field over the surface of the Sun trapped hot gas.
Brightest Star in the Solar System
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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Aerial view of Tokyo, Japan at dusk circa 2009. Tokyo Tower (right) located in Shiba Park, Minato, Tokyo, Japan. Office buildings, architecture, skyscrapers, skyline.
Is Light Pollution Really Pollution?
Spiral Galaxy type Sa-Sb or Sa/Sb in the constellation Virgo. The majestic Sombrero Galaxy Messier 104 (M104) or NGC 4594. The team took six pictures of the galaxy, stitched them together to create the final composite image. Photo from May-June 2003
9 Britannica Articles That Explain the Meaning of Life
1 July 2002: The Solar and Heliospheric Observatory (SOHO) satellite reveals a massive solar eruption more than 30 times the Earth's diameter. The eruption formed when a loop of a magnetic field over the surface of the Sun trapped hot gas.
6 Questions About the Sun Answered
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?
Infinite space background with silhouette of telescope. This image elements furnished by NASA.
Telescopes: Seeing Stars
Discover
Martin Luther King, Jr.
Why We Celebrate MLK Day
Malayan Leaf Frog - Megophrys nasuta
9 Animals That Look Like Leaves
Washington, D.C. locator map.
What State Is Washington, D.C. In?
Close-up of ostriches (Struthio camelus) necks and heads; location unknown.
6 of the World's Most Dangerous Birds
Panama Canal infographic
Timeline and Map of the Panama Canal
jeans, denim, pants, clothing
Why Do We Say “A Pair of Pants”?
Andrew Jackson delivering a speech while on his way to Washington, D.C., for his inauguration in 1829. From Harper's Weekly, 1881.
5 Remarkably Close U.S. Presidential Elections

colour–magnitude diagram: References & Edit History

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Article History

Type Description Contributor Date
Article revised and updated. Sep 16, 2008
Added new Web site: University of Washington Astronomy Department - Cluster Color-Magnitude Diagrams and the Age of Stars. Sep 20, 2007
Article added to new online database. Jul 20, 1998
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