The first visitor from another solar system has just been spotted

AEONS ago, perhaps long before Earth itself existed, a hunk of rock circling a star somewhere in the Milky Way was thrown out of its orbit so violently that it was ejected from its natal system. Thus began a journey that would, in time, take it within an astronomical hair's breadth of humanity's home planet. On October 19th this visitor was spotted by Rob Weryk of the University of Hawaii in pictures produced by Pan-STARRS 1, a telescope on Haleakala. It thus became the first interstellar interl...