The plasma trail of the Progress 42P disposable, unmanned supply vehicle is seen in an October 29 picture by an International Space Station astronaut.
Several times a year robotic spacecraft take food, water, fuel, medical supplies, and more to the space station.
After the vehicles are filled with trash from the station, they're sent back into space—"essentially using Earth's atmosphere as an incinerator for both the spent spacecraft and the refuse," according to NASA.
The picture, taken when the space station was over the southern Pacific Ocean, shows light from the rising sun illuminating the curve of Earth.
The thin strip of green above the curve is airglow, emissions of light from atoms and molecules in the upper atmosphere when they are excited by ultraviolet radiation.
(See pictures of early U.S. spaceflight.)