Hubble sees outburst

In a dress rehearsal for the rendezvous between NASA’s Deep Impact spacecraft and Comet 9P/Tempel 1, the NASA/ESA Hubble Space Telescope captured dramatic images of a new jet of dust streaming from the icy comet.

More at:
http://www.esa.int/SPECIALS/Rosetta/SEMSBN5DIAE_0.html