Orbiting 325 miles above the Earth, the Wide-field Infrared Survey Explorer takes its name from the fact that it is designed to detect objects that give off infrared light or heat (unlike optical telescopes). WISE will take the most detailed infra-red view of the entire sky by next October, at which point the frozen coolants which chill its instruments will be depleted. Here are a few hard-to-believe-they’re-real images of the Andromeda Galaxy, across different wavelengths (blue = short; red = long). Follow the link above for more.
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