Three days until Deep Impact's encounter with Hartley 2

The week is finally here: Deep Impact flies past Hartley 2, the smallest comet yet to be visited by a spacecraft, on Thursday, November 4 at 13:50 UTC. Most of my writing and Tweeting this week will probably be about this event! To remind you of what’s to come, see my Deep Impact Hartley 2 encounter timeline and my writeup of last week’s preview press briefing. Hartley 2 passed through perihelion 3 days ago, and had its nearest approach to ….


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