It's a missionthat's testingoutthetechnologiesthatcouldcleanupspacejunk.
Thiscrackinthewindowoftheinternationalspacestationwasthoughttohavebeencausedwhen a tinyflecksofpainthittingscientistsareparticularlyworriedabout a Europeansatellitethesizeof a doubledeckerbus.