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Images Dated 22nd August 2002

Choose from 26 pictures in our Images Dated 22nd August 2002 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.

The Great Equatorial Armillary Instrument Featured 22 Aug 2002 Image

The Great Equatorial Armillary Instrument

The Great Equatorial Armillary Instrument, one of the instruments at Tycho Brahe's great observatory at Uraniburg on the island of Hveen, Denmark (now Ven, Sweden). The instrument was used to determine the declination (celestial latitude) of stars. The circle was 272 cm in diameter and its edge was calibrated to one quarter of a minute of arc. The instrument could also be used to measure right ascension (celestial longitude) by comparison with a star of known right ascension. The illustration is from Tycho's book Astronomiae Instauratae Mechanica, published in Wandesburgi in 1598


White bread mould, SEM Featured 22 Aug 2002 Image

White bread mould, SEM

White bread mould. Coloured scanning electron micrograph (SEM) of the fruiting bodies of two types of mould growing on white bread. The moulds are Penicillium sp. and Mucor mucedo. Spores from these moulds circulate freely in the air. On a favourable medium, they germinate and form an extensive network of threads (hyphae) that absorb food for growth and spore production. The Mucor spores are borne in the sac-like bodies seen, which are called sporangia. The Penicillium spores, known as conidia, are borne directly on special hyphae called conidiophores. Magnification: x40 at 6x7cm size