SOFIA Studies Comets
Images of Comet ISON were obtained using SOFIA’s FORCAST camera at wavelengths of 11.1, 19.7, and 31.5 microns. Measurements at 31.5 microns, shown here, are crucial for determining the temperature and other characteristics of the comet’s material, and cannot be made using ground-based telescopes.
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https://www.nasa.gov/image-detail/sofia-studies-comets/
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