Comet Lovejoy on a Coronograph (IMAGE) NASA/Goddard Space Flight Center Caption This is an image of Comet Lovejoy as it moves ever closer toward the sun taken on December 15, 2011 at 4:30 AM ET. This image is what's known as a "coronograph" in which the camera -- the Large Angle and Spectrometric Coronagraph C3 instrument on the Solar Heliospheric Observatory -- obscures the sun itself so as to be able to observe its fainter atmosphere, the corona. Credit Credit: ESA/NASA/SOHO Usage Restrictions None License Licensed content 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.