The first true color image of Comet 67P

You've seen numerous black and white photos of Comet 67P, which make the comet look grey.

Back here, we talked about how its gaseous emissions were a mix of ammonia, methane, formaldehyde, hydrogen sulphide, hydrogen cyanide, sulphur dioxide and carbon disulphide.

To a human nose, this would be combination of "rotten eggs, cat urine and bitter almond."

Now we know what the comet looks like to a human eye.

Here's the first true color image of Comet 67P, showing that when you cook those organic compounds in high-UV sunlight, they turn a reddish brown:

Story: http://tinyurl.com/lssom29