A luxury cruise ship carrying 206 people has run aground in remote eastern Greenland with the nearest help by sea days away, the Danish military's Joint Arctic Command (JAC) said on Tuesday.The Ocean Explorer ran aground on Monday in Alpefjord in a national park some 1,400 km (870 miles) northeast of Greenland's capital Nuuk, the JAC said in a statement.There were no reports of injuries, JAC said.