The object, 2000 EB173, was found in March using data collected by a 39-inch (1-meter) telescope at the CIDA Observatory in Venezuela. The space rock is estimated at about one-quarter the size of Pluto and joins a club of more than 300 other "trans-Neptunian objects," small bodies that orbit the Sun beyond Neptune... Charles Baltay, a Yale University physicist who headed up the investigation [said] ... "We believe that this thing has been orbiting since the formation of the solar system. So it's the primordial stuff, and it's bright enough that we can study it in detail." The object appears...