A rendering of objects currently in Low Earth Orbit (not illustrated to scale). According to NASA, "approximately 95 percent of the objects in this illustration are orbital debris, i.e., not functional satellites." NASA hide caption

itoggle caption NASA

In this rare image taken on July 19, 2013, the wide-angle camera on NASA's Cassini spacecraft has captured Saturn's rings and our planet Earth and its moon in the same frame. NASA/JPL-Caltech/Space Science Institute hide caption

itoggle caption NASA/JPL-Caltech/Space Science Institute

That little blue dot is how Earth will likely appear in a photo shot from a spacecraft that is studying Saturn. NASA/JPL-Caltech simulation hide caption

itoggle caption NASA/JPL-Caltech simulation

"The Galaxy Next Door" — This composite image of the Andromeda galaxy was produced by NASA's Galaxy Evolution Explorer, showing Andromeda's ultraviolet side. NASA sent a decommission command to the space telescope Friday. NASA hide caption

itoggle caption NASA

Radar images of asteroid 1998 QE2, taken when the cosmic traveler was about 3.75 million miles from Earth, revealed that the asteroid, with a 1.7-mile diameter, has a moon or satellite revolving around it. NASA/JPL-Caltech/GSSR hide caption

itoggle caption NASA/JPL-Caltech/GSSR