We hear a lot about 'going green' these days and it seems even the Universe can't endure one more moment of Al Gore putting his hands together, as if in prayer, and guilting us into investing in carbon trading companies, one of which he happens to own stock in.
As a peace offering, the cosmos is offering comet Lulin, which is making an appearance in the nighttime sky this month - and it's green. Literally. Don Yeomans of JPL, manager for NASA's Near-Earth Object Program Office, answers a few questions about this odd comet.
Sky chart showing comet Lulin on Feb. 24, 2009. Image credit: NASA/JPL