The NuSTAR telescope, seen in this artist's illustration, will soon be sending back data that researchers will use to study black holes. NASA/JPL-Caltech hide caption

itoggle caption NASA/JPL-Caltech

The Eskimo Nebula, as shown through the Hubble Telescope. NASA/Flickr hide caption

itoggle caption NASA/Flickr

The northern lights over Tromsoe, northern Norway, on Jan. 24, 2012. Rune Stoltz Bertinussen/AFP/Getty Images hide caption

itoggle caption Rune Stoltz Bertinussen/AFP/Getty Images

An artist's illustration of events on the sun changing the conditions in near-Earth space. NASA hide caption

itoggle caption NASA