Solar Radiation Collection

Villa Tournesol, 1899. A revolving clinic designed to take full advantage of the heat and light of the sun for therapeutic purposes

The solar spectrum, 1814. Joseph von Fraunhofers (1787-1826) drawing of the lines of the solar spectrum, and above it a curve showing the intensity of sunlight in different parts of the spectrum

Aurora Borealis or Northern Lights, curtain form 1839. [1872]. Artist: Rapine
Aurora Borealis or Northern Lights, curtain form, 1839 (1872). Observed at Bossekop, Norway, 19 January 1839. Aurorae are caused by the interaction of the particles in the solar wind with the Earths

Aurora Borealis or Northern Lights observed from northern Norway, 10 October 1868, (1906). Aurorae are caused by the interaction of the particles in the solar wind with the Earths magnetic field

Aurora Borealis (Northern Lights) viewed from space. Aurorae are caused by the interaction of the particles in the solar wind with the Earths magnetic field

Aurora Australis, April 1994. The curtain form of the Aurora Australis viewed from the Space Shuttle Endeavour, part of which can be seen in top right foreground

(Alexandre) Edmond Becquerel (1820-1891), French physicist. The son of the physicist Antoine Cesar Becquerel and father of (Antoine) Henri Becquerel, the discoverer of radioactivity

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