Images Dated 9th August 2004

open-uri20120928-19324-jjl6pp

File Name :DSC_1916.JPG
File Size :1.8MBBytes)
Date Taken :2004/08/07 12:15:42
Image Size :2464 x 1632
Resolution :300 x 300 dpi
Number of Bits :8bit/channel
Protection Attribute :Off
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Camera :NIKON D2H
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Metering Mode :Matrix
Exposure Mode :Manual
Speed Light :No
Focal Length :100 mm
Shutter Speed :1/500second
Aperture :F9.0
Exposure Compensation :0 EV
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Image Type :Color
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Data showing the distribution of dark matter

Dark matter distribution. Hubble Space Telescope (HST) data showing the distribution of invisible dark matter in a cluster of galaxies. This 3- dimensional map shows the concentration of dark matter as height, with individual galaxies appear- ing as pinnacles. This map was produced by analys- ing light from a distant galaxy that had been bent by the gravity of a nearer cluster of galaxies. This gravitational lens created multiple images of the distant galaxy that allowed the mass distribu- tion to be calculated; the mass of visible matter, such as stars, was then subtracted. Most of the galaxy cluster's mass was found to be dark matter

© LUCENT TECHNOLOGIES/BELL LABS/SCIENCE PHOTO LIBRARY

False-colour TEM of a group of human lymphocytes

False-colour transmission electron micrograph (TEM) of a group of human lymphocytes, the smallest of the white blood cells. The central nucleus (brown) is slightly indented and the chromatin (genetic material - DNA) is moderately condensed; the darker coloured chromatin is seen towards the nuclear wall. The cytoplasm (yellow) is sparse, but contains a few mitochondria (small green, cigar-shaped bodies - the site of energy production and storage within the cell). The outer plasma membranes support a few microvilli (projections). Lymphocytes undergo transformations when activated in their role in immunological defence. Magnification x1650 at 35mm size

© Cnri/Science Photo Library