Nasa astronaut Scott Kelly took a moment out of his year-long mission aboard the International Space Station to share this image of an aurora lighting up the Earth's horizon.
Kelly wrote on Twitter, "#Aurora trailing a colorful veil over Earth this morning. Good morning from @space_station! #YearInSpace"
Nasa explains the aurora: "The dancing lights of the aurora provide spectacular views, but also capture the imagination of scientists who study incoming energy and particles from the sun. Aurora are one effect of such energetic particles, which can speed out from the sun both in a steady stream called the solar wind and due to giant eruptions known as coronal mass ejections or CMEs."
Kelly constantly feeds fresh images from the station to his Twitter followers.
