http://www.newsweek.com/largest-comet-ever-approach-sun-objects-solar-system-space-1634213 > A near 100 mile-wide comet from the outer edges of the solar system is headed toward the sun and the inner solar system where Earth dwells. > At an estimated 93 miles wide, the Bernardinelli-Bernstein Comet is believed to be the largest comet ever discovered. It will make a close approach to Saturn's orbit in a decade.