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A time exposure of the Milky Way with a Perseid meteor trail. Bands of dust and glowing nebulae are seen along the band of billions of stars that is our Milky Way galaxy seen from the inside. The Perseids are meteors seen around 12th August each year which appear to originate from the direction of the constellation Perseus. These meteors are small dust particles from a cometary dust trail left by Comet Swift Tuttle as the Earth passes through its stream. Photographed in Shropshire, United Kingdom 2015. (KEYSTONE/SCIENCE PHOTO LIBRARY/CHRIS MADELEY/SCIENCE PHOTO LIBRARY)