Images Dated 26th February 2008

Celestial mechanics, medieval artwork

Celestial mechanics. Coloured historical artwork depicting a medieval pilgrim looking out from the sky (blue) to see the mechanics of the heavens (upper left). Cogs (yellow) can be seen in the left corner, with tracks that the Sun, moon and stars move along. This is an example of the classical geocentric (Ptolemaic) worldview that dates back to Ancient Greek times. It was replaced by the heliocentric (Copernican) model, proposed by Nicolaus Copernicus in 1543. This woodcut is from The Atmosphere by Camille Flammarion, published in 1873

© DETLEV VAN RAVENSWAAY/SCIENCE PHOTO LIBRARY

A vehicle commander with his radio equipment attached to his vest

A vehicle commander with his radio equipment attached to his vest. Each vehicle has a vehicle commander who keeps in contact with each other, the convoy commander, and any units in the surrounding area. Constant communication is vital to the success of a mission. This ensures that each group of Marines are on the same page and aware of the situation at all times. As lead vehicle commander, he and his driver are also responsible for navigation and spotting any improvised explosive devices that may be placed in the road

© Stocktrek Images

Th chief facade of the temple at Angkor-Wat, Cambodia, 1895

Th chief facade of the temple at Angkor-Wat, Cambodia, 1895. The temple fell into ruin after conquest of Khmers by the Siamese in 14th century. From The Universal Geography with Illustrations and Maps, division XVI, written by Elisee Reclus and published by Virtue & Co. Limited (London, 1895)

© The Print Collector / Heritage-Images

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