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

Images Dated 16th January 2003

Choose from 31 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 Print

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

Black-faced Cormorant Featured 16 Jan 2003 Print

Black-faced Cormorant

DH-2932
Black-faced Cormorant
Derwent River, Hobart Harbour, Tasmania, Australia
Phalacrocorax fuscescens
Don Hadden
Please note that prints are for personal display purposes only and may not be reproduced in any way

© Don Hadden/ardea.com

Australasia, Australasian, Australia, Australian, Bird, Black Faced, Coastal, Cormorant, Cormorants, Oceania, Sea Birds, Single, Tasmania, Wild Life