Rosetta mission scientists have discovered an unusual geological formation in the Aker region on the large lobe of 67P/Churyumov-Gerasimenko. Image of the boulders taken by the Rosetta spacecraft on September 19, 2014 from a distance of about 18 miles (29 km). Image credit: ESA / Rosetta / MPS / OSIRIS Team / UPD / LAM / IAA / SSO / INTA / UPM / DASP / IDA. “We had noticed this formation already in earlier images, however, at first the boulders...
