Light echoes from exploding star
Light echoes from an exploding star. Hubble Space Telescope image of an illuminated dust shell around the star v838 Monocerotis. This star underwent a massive brightening in January 2002, temporarily becoming the brightest star in the galaxy. The light from this outburst reflects from a series of dust shells around the star, which are thought to have been ejected during previous activity. The phenomenon allows study of the fine structure of the dust shells, which could help explain why the star behaves as it does. This image was taken on 8th February 2004 by the Advanced Camera for Surveys.
© NASA/ESA/STSCI/H.BOND/SCIENCE PHOTO LIBRARY
Oil refinery at night
Oil refinery at night. A tailings pond, for the disposal of waste material from the mining and refining process, is seen in the foreground. This is the Syncrude oil processing plant, in the Athabasca Oil Sands, Alberta, Canada. The oil-bearing sands are excavated, and then processed to obtain crude oil and bitumen. Syncrude began operating in the 1970s. As of 2008, it is the world's largest producer of crude oil from oil sands, extracting hundreds of thousands of barrels a day. The Athabasca oil reserves are among the largest in the world.
© DAVID NUNUK/SCIENCE PHOTO LIBRARY
'Night Rain Has Turned The Pavements To A Pool of Reflections', c1935. Creator: Calkin
'Night Rain Has Turned The Pavements To A Pool of Reflections', c1935. The fountains in Trafalgar Square, central London. On the left is the National Gallery, with the equestrian statue of King George IV to the right, and the spire of St Martin-in-the-Fields behind. From "Wonderful London, Volume 2", edited by Arthur St John Adcock. [The Fleetway House, London, c1935]
© The Print Collector/Heritage Images