|67P / Image credit: ESA / Rosetta / NAVCAM, License CC BY-SA IGO 3.0|
The European Space Agency's Rosetta probe travelled all the way to comet 67P/Churyumov-Gerasimenko to collect unprecedented cometary details. The space probe keeps sending unexpected particulars about the comet—particulars with implications far beyond the comet itself.To finish reading about the peculiar particulars, click on "Unexpected Oxygen on Young-Looking Comet".
As Rosetta approached the comet in the fall of 2014, its instruments began detecting chemicals in space nearby the comet. The mission's earliest discoveries included an unexpected fountain-like emission of over 6,000 gallons of water vapor per day. Similar to the plumes that eject material into space from Saturn's moon Enceladus, this surprising level of activity points to a much younger comet than commonly asserted.