NASA. LARGE FORMAT. This image is a color composite of a sup - Lot 268

Lot 268
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NASA. LARGE FORMAT. This image is a color composite of a sup - Lot 268
NASA. LARGE FORMAT. This image is a color composite of a supernova remnant: X-ray (blue), optical (green) and radio (red). This supernova is the remnant of a star that exploded in a nearby galaxy, the Small Magellanic Cloud. The star exploded at a speed in excess of 20 million kilometers per hour and collided with the surrounding gas. This collision produced two shock waves, or cosmic sonic booms, one propagating outwards and the other bouncing back into the matter ejected by the explosion. The radio image, in red, was produced using the compact array of the Australian telescope. The radio waves are caused by high-energy electrons spiralling around the magnetic field lines in the gas, tracing the outward-moving shock wave. The Chandra X-ray Observatory image, in blue, shows gas heated to millions of degrees by the bouncing or reverse shock wave. The X-ray data show that this gas is rich in oxygen and neon. These elements were created by nuclear reactions inside the star and projected into space by the supernova. The Hubble Space Telescope optical image, in green, shows dense clusters of oxygen gas that have "cooled" to around 30,000 degrees. 2000. Vintage chromogenic print. Numbering on front. Label on back. 40.6 x 40.6 cm with margins.
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