Add Yahoo as a preferred source to see more of our stories on Google. Japan's Hayabusa 2 mission to asteroid 1998 KY26 might have unexpected challenges following new data on the rock's size, spin, and ...

The tiny asteroid 1998 KY26 (center) is observed here by the Gemini South telescope, one half of the International Gemini Observatory, funded in part by the U.S. National Science Foundation and ...

We constantly fret about external threats and foreign attacks — but its an entirely other level of concern when the offensive comes from outer space. Two close calls with asteroids earlier this year ...

A distant asteroid that a Japanese spacecraft is en route to visit could be a much harder target to reach than previously thought, according to new telescope data. The asteroid, known as 1998 KY26, is ...