Source: NASA Spitzer
Image credit: NASA/JPL-Caltech/Penn State.
These two infrared images were taken by NASA's Spitzer Space Telescope in 2004 and 2009. They show a faint object moving through space together with a dead star called a white dwarf. The object, thought to be a "failed" star, or brown dwarf, is the coldest stellar companion to be directly imaged outside our solar system. (read source)