In 1910, cyanogen gas in the tail of Halley's Comet threatened to SNUFF OUT ALL LIFE ON EARTH. But really, it didn't.
ISON Links Roundup
How do we figure out the size of a cometary nucleus? Part 1 of 2.
Comet ISON is back.
We've visited comets! Learn about some of the missions.
Join in on our second Hubble Hangout on Comet ISON
ISON links roundup
Hubble Hangout: How to Get Comet ISON Hubble Data
Dean Hines explains how polarimetric observations are shedding light on ISON's structure.
The link between comets and meteor showers
The second day of CometCon.
The story of ISON's discovery.
One researcher predicts a break-up for ISON.
Spitzer's view of Comet ISON
Today's Comet ISON links from around the web
An explanation of making Hubble's color image of Comet ISON.
Comet Lovejoy as seen from space.
A behind the scenes look at our ISON GIF and its quirks, wherein we find (unsurprisingly) that orbital dynamics are...complicated.