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Astronauts Scott Kelly and Tim Peake have been posting pictures of the Earth from the International Space Station, but their most recent photos are more stunning than usual.
Photos posted on Kelly's Facebook page show the astronauts' views of the Aurora Borealis. The extraordinary pictures were said to be taken while Kelly taught Peake how to use his Nikon camera.
The natural light display they captured happens when a burst of the sun's gas and magnetic field causes a solar wind -- the stream of energy specks from the sun.
That stream hits the Earth's atmosphere and creates the Northern Lights' effect.