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Comet ISON

This could be your last best chance to see Comet ISON as it hurtles towards the sun following a nearly 16-fold increase in brightness last week. Many astronomers are doubtful it will survive its Solar close encounter, but if it does it could end up visible during the day when it returns in December, rivaling the Great Comet of 1680. [more inside]
posted by alms on Nov 20, 2013 - 22 comments

Strike One for Comet Apophis

Comet Apophis flew to within 9 million miles of the Earth yesterday. In 2029 it will come around again and get within 20,000 miles (closer than geosynchronous satellites). Then in 2036 it will approach again. At one time it was thought that it had a 3.5% chance flying through a specific keyhole of space in 2029, which would indicate that it would hit the Earth in 2036. But now the odds are calculated to be infinitesimal. Let's hope the astronomer assumptions are correct about that pesky Yarkovsky Effect. [more inside]
posted by eye of newt on Jan 10, 2013 - 32 comments

It has a tail. It will do what it wants to.

A comet has been discovered and we may get to see it. If it doesn't boil away first, we'll be able to see it November 29th, 2013, give or take a day. Lots of back-slapping on the comet email list. (Via.)
posted by univac on Sep 25, 2012 - 30 comments

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