Friday, October 25, 2013

Why Is Comet ISON Green?

Why Is Comet ISON Green?:
Recent images of Comet ISON along with spectral data. Credit and copyright: Chris Schur.
Recent images of Comet ISON along with spectral data. Credit and copyright: Chris Schur.
Undoubtedly, you’ve been seeing the recent images of Comet ISON now that it is approaching its close encounter with the Sun on November 28. ISON is currently visible to space telescopes like the Hubble and amateur astronomers with larger telescopes. But you might be wondering why many images show the comet with a green-ish “teal” or blue-green color.
Amateur Astronomer Chris Schur has put together this great graphic which provides information on the spectra of what elements are present in the comet’s coma.
For the conspiracy theorists out there, the green color is actually a good omen, and lots of comets display this color. (...)
Read the rest of Why Is Comet ISON Green? (521 words)

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