The first ground based infrared spectrum of Jupiter's moon Amalthea reveals that it must have formed far from its current location.

This new result, based on observations with the Subaru telescope and the NASA Infrared Telescope Facility by a team of researchers from the National Astronomical Observatory of Japan, the University of Hawaii, and the University of Tokyo, sheds new light on our Solar System's turbulent past.

Link

More info: Subaru telescope web page