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  Galaxy Evolution Explorer and Earth (Concept)

Galaxy Evolution Explorer

The Galaxy Evolution Explorer was launched in 2003. Its mission was to study the shape, brightness, size and distance of galaxies across 10 billion years of cosmic history. The 50-centimeter-diameter (19.7-inch) telescope sweeped the skies in search of ultraviolet-light sources.

Ultraviolet is light from the higher end of the electromagnetic spectrum, just above visible light in frequency, but below X-rays and gamma rays. While a small amount of ultraviolet penetrates Earth's atmosphere, causing sunburn, the Galaxy Evolution Explorer observes those ultraviolet frequencies that can only be seen from space.

Image Credit: NASA/JPL-CalTech

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- NASA: Home Page
- NASA: Galaxy Evolution Explorer Home


 
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