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Large Magellanic Cloud; the large red patch is the 30 Doradus nebula, one of the largest H II regions known. (Copyright © Australian Astronomical Observatory; photograph by David Malin from AAT plates)

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from article Magellanic Clouds

Small Magellanic Cloud. This image is composed from two images of the Digitized Sky Survey 2. (ESA/Hubble; Digitized Sky Survey 2)

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from article Magellanic Clouds

Large Magellanic Cloud. (Harvard Observatory photograph by P. Hodge)

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from article Magellanic Clouds

Giant gas cloud centered on 30 Doradus in the Large Magellanic Cloud. (Cerro Tololo Inter-American Observatory photograph by P. Hodge)

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from article Flat-panel display device

Field-emission display, an example of a matrix-addressed display. Each pixel is addressed in an X-Y matrix. In the case of a color display, each pixel is subdivided into a red, a blue, and a green subpixel.

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from article Digital object identifier system

Digital Object Identifier components.

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from article Sewage solid

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from article Sewage solid

Time required for 90% digestion of sewage sludge at different temperatures. (After K. Imhoff and G.M. Fair, Sewage Treatment, John Wiley & Sons, 1940, reprint 1946)

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from article Universe

An image from a computer simulation of large-scale structure formation in the universe, with vast filaments of relatively dense matter separated by even larger voids with low matter density. Each dot indicates an individual galaxy. (Credit: Max…

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from article Universe

The Hertzsprung-Russell (HR) diagram, which plots stars' temperatures (x axis) against their luminosities (y axis). Numerous examples of stars in the Milky Way are included in this sample diagram. (Credit: ESO)