Comet ISON Approaches Inner Solar System (video) NASA/Goddard Space Flight Center Loading video... Caption Comet ISON is now approaching the inner solar system. Discovered last year, the comet remains unusually active for its distance from the sun. If current trends continue, ISON could rank as one of the brightest comets in decades when it makes its close approach to the sun in late Nov. This animation shows the comet's approach and departure from the inner solar system from various perspectives. Credit Credit: NASA's Goddard Space Flight Center Scientific Visualization Studio Usage Restrictions None Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.