PHOTOS: European spacecraft lands on cometFILE - In this Aug. 3, 2014 file photo taken by Rosetta's OSIRIS narrow-angle camera Comet 67P/Churyumov-Gerasimenko is pictured from a distance of 285 kms.
ESA/Rosetta/MPS for OSIRIS Team, File
The European Space Agency says it has succeeded in landing a spacecraft on a comet for the first time in history.