Two more posts on Comet ISON – at http://phys.org/print303650046.html … NASAs Messenger spacecraft, orbiting Mercury, has captured images of Comet ISON – and Comet Encke.
At http://phys.org/print303653352.html … a NASA funded team are going to launch the Far-ultraviolet Off Rowland-circly Telescope for Imaging and Spectroscopy to measure the presence of molecules and atoms in Comet ISON. This appears to be an important study which should determine what is actually going on as ISON brightens.