ISON: 386 Million Miles Away, Closing Fast (image) University of Maryland Share Print E-Mail Caption Comet ISON may appear brighter than the full Moon around the time it approaches the Sun Nov. 28, but it is not yet visible to the naked eye. The Hubble Space Telescope snapped this image as ISON hurtles toward the sun at about 47,000 miles per hour. The image was taken in visible light, and blue false color was added to bring out details. Credit Credit: NASA, ESA, J.-Y. Li (Planetary Science Institute), and the Hubble Comet ISON Imaging Science Team. This image was taken in visible light, and blue false color was added to bring out details. Usage Restrictions None Share Print E-Mail 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.