Saturn's rings and Earth from the outer solar system, observed by Cassini.
VIIRS nighttime image of Japan and Korean Peninsula, May 2014.
Landsat 8 images show Sapporo on October 10, 2013 and April 20, 2014.
Average yearly atmospheric nitrogen dioxide the U.S., 2005-2011.
Images from Hubble show light echo surrounding V838 from 2002 to 2006.
caption from group area
Daily averages of ocean particulate inorganic carbon from 2002 to 2014.
How stars blow up is a mystery finally being unraveled.