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Home > All Images > 2003 > January > 16 Jan 2003

Images Dated 16th January 2003

Choose from 24 pictures in our Images Dated 16th January 2003 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Illustration showing Koenigsberg heliometer Featured 16 Jan 2003 Image

Illustration showing Koenigsberg heliometer

Illustration showing the Koenigsberg heliometer, an intrument designed by Friedrich Bessel, director of the Koenigsberg observatory, and built for him by Joseph von Fraunhofer. A heliometer is a refracting telescope in which the objective lens is divided into two parts, each half producing a separate image. The two halves of the objective can be moved to bring the two images together. The amount of movement needed is used to determine the size of an object or the separation of two different objects. Bessel used this instrument to measure the first stellar parallax, that of the faint star 61 Cygni. From this he could calculate its distance; about six light years from Earth

© DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY

Engraving of Nicolas Copernicus, Polish astronomer Featured 16 Jan 2003 Image

Engraving of Nicolas Copernicus, Polish astronomer

Engraving of Nicolas Copernicus (1473-1543), Polish astronomer. Copernicus believed that the planetary positions could be calculated more easily if the Sun, rather than the Earth, was at the centre of the Universe. Copernicus continued to believe in perfectly circular orbits. He described his system in a book, but hesitated publishing it due to the heretical nature of its thought. Not until 1543, some weeks before his death, was the book published. The Copernican System as it came to be known hearlded the start of the Scientific Revolution

© DR JEREMY BURGESS/SCIENCE PHOTO LIBRARY