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Home > All Images > 1992 > December > 9 Dec 1992

Images Dated 9th December 1992

Choose from 10 pictures in our Images Dated 9th December 1992 collection for your Wall Art or Photo Gift. All professionally made for Quick Shipping.


Red dwarf star Featured 9 Dec 1992 Print

Red dwarf star

Red dwarf star. Artwork representing the intense activity of a red dwarf star. These are among the least massive stars in the universe ranging from 0.1 to 0.7 solar masses. The star shown here belongs to a subclass of red dwarf stars, known as the flare stars, which are characterised by frequent (3-4 per hour) flares. These are seen as sudden brightenings with a typical rising time between 1s and 1min and a slower fading time between 1min and 1 hour. During a flare, filaments of gas in the atmosphere are accelerated outwards with speeds up to 1000km/s. Such speeds are greater than the escape velocity and therefore the matter ejected will be lost from the parent star

© JULIAN BAUM/SCIENCE PHOTO LIBRARY