Image from ISON and Encke Meteorites

On November 21st, Comet ISON entered the field of view of the STEREO-A spacecraft's H1 cameras. Solar storms from Mercury, Earth, and the Sun were also captured in this field of view. Due to the STEREO-A spacecraft's field of view, Earth was the farthest object, while Mercury was the closest. Both of their light sources produced a streak of light in the camera's detectors. The STEREO-A and SOHO spacecraft will be able to track Comet ISON until it interacts with the Sun on November 28th, entering a life-or-death struggle. (When comets approach the Sun too closely, they can be overwhelmed by its gravity and fall to the Sun's surface. This is known as a cometary suicide.)