Saturn silhouetted, Cassini image
Saturn silhouetted. Cassini spacecraft image of Saturn and its ring system with the Sun directly behind. The view revealed two previously unknown rings. One, associated with the orbits of the moons Janus and Epimetheus, lies in between the outer edge of the bright main rings and the thin grey/brown G Ring. The other, associated with the orbit of the moon Pallene, lies just inside the broad and diffuse outer E ring. Earth is seen as a bright dot at the ten o'clock position between the bright main rings and the G Ring. This is a composite of 165 images taken at infrared, visible light and ultraviolet wavelengths by the Cassini spacecraft on 15th September 2006, while it was around 2.2 million kilometres from Saturn.
© Nasa/Jpl/Space Science Institute/Science Photo Library
Northern lights. The Northern Lights are created as electrically charged particles from the Solar wind are pulled in toward the magnetic poles by the Earth's magnetic field. As these particles collide with the atoms of gas in the ionosphere about 80km above the ground, they give the atoms energy and they become 'excited'. The atoms spontaneously release this energy in discrete amounts, resulting in particular colours of light being emitted. Photographed in the Swedish Arctic.
© Copyright Jeremy Walker
Milky Way over Scottish loch
Milky Way, over Clatteringshaws Loch, Dumfries and Galloway, Scotland. The Milky Way, our galaxy seen from the inside, is the band of stars, nebulae and dust lanes running vertically across the sky. This is an enhanced version of C014/5599. Photographed on 21 September 2012.
© THOMAS HEATON/SCIENCE PHOTO LIBRARY
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