RT @ESO: #TBT Comet Tempel 1 after part of the Deep Impact spacecraft plunged onto it. socsi.in/w5vrM https://t.co/atDEQxcZ5Y
RT @ESO: #TBT Comet Tempel 1 after part of the Deep Impact spacecraft plunged onto it. socsi.in/w5vrM https://t.co/atDEQxcZ5Y