IN SPACE:   In this handout from NASA/ESA, an artist's concept illustrates a quasar, or feeding black hole. NASA's Wide-field Infrared Survey Explorer (WISE) revealed millions of potential black holes in its survey of the sky in 2011. The WISE telescope, which ceased operation is February of 2011 after it ran out of coolant to keep its electronics cool, made the full sky image and was released to the public in March with hopes of astronomers making discoveries.  (Photo by NASA/ESAvia Getty Images)