HEAT SEEKER The EUNIS rocket split ultraviolet light from a region (white) of the sun into its component wavelengths (left, right), which revealed emissions from highly ionized atoms in a 10-million-degree plasma.
THE MARTIAN DIARIES Curiosity has explored Mars for over two and a half years. What if the rover kept a scrapbook?
GREEN GOBLIN Filaments of gas known as voorwerpjes (green) orbit the galaxy UGC 7342 in this image from the Hubble Space Telescope. The galaxy is about 650 million light-years away in the constellation Coma Berenices.
NASA, ESA and W. Keel/University of Alabama, Tuscaloosa