Hubble Catches a Glimpse of the Most Distant Active Comet Ever Seen

It's 1.5 billion miles from the sun, and has been described by scientists as "the most primitive comet we've seen."

from gizmodo http://www.gizmodo.co.uk/2017/09/hubble-catches-a-glimpse-of-the-most-distant-active-comet-ever-seen/