SpaceWinking exoplanets could shed light on distant comet strikes Shoemaker-Levy 9, a comet that smacked into Jupiter in 1994, could help us detect similar collisions in other solar systems ¿ìè¶ÌÊÓÆµ
SpaceNeptune's sudden jolt could explain weird ring in Kuiper belt A band of strangely tight-knit icy objects in the Kuiper belt has defied explanation. Now a simulation rewinding the solar system to its babyhood has an answer ¿ìè¶ÌÊÓÆµ