The unique rocky comet C/2014 S3 (PANSTARRS)
An illustration of the Oort cloud, the icy bodies at the edge of the solar system, with a red line indicating how bodies can be nudged toward the inner planets. (Image credit: ESO/L. Calçada)
An illustration of the Oort cloud, the icy bodies at the edge of the solar system, with a red line indicating how bodies can be nudged toward the inner planets. (Image credit: ESO/L. Calçada)