See You Later, Herschel
Last April, the European Space Agency's Herschel Space Telescope officially ended observations. The last of its liquid helium had run out, after three successful years orbiting in L2. Instead of sending it into the atmosphere to burn up, like a spacecraft in low-Earth orbit, astronomers fired Herschel's thrusters and sent it off to orbit around the sun. Above, in the cross-hairs, is one of the last good looks we'll get at the spacecraft before it comes back around near Earth in 13 years.
Image: N. Howes/E. Guido/Faulkes Telescope/LCOGT