See Comet Lovejoy’s Path In This Amazing Composite Photo
This photo combines a series of November 2013 observations by NASA’s NEOWISE (Near-Earth Object Wide-field Survey Explorer) mission, spanning half a degree. The red color, which makes Lovejoy stand out so clearly, is due to gas and dust in the comet’s coma. Image credit: NASA/JPL-Caltech At the time the images were taken, Lovejoy was 1.7…