NRAO / AUI / NSF / SCIENCE PHOTO LIBRARY NRAO / AUI / NSF / SCIENCE PHOTO LIBRARY
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Radio 'photograph' of active galaxy Cygnus A (3C 405) at 6 cm wavelength, taken with the Very Large Array (VLA) radio telescope in New Mexico. Cygnus A is a typical radio galaxy with twin jets, thought to be collimated beams of plasma, emanating from its nucleus and forming two extended, radio-emitting lobes. This image has been computer processed to bring out the details in the two radio lobes. Their wispy appearance was unexpected and, as yet, remains unexplained. On photographs taken at visible wavelengths Cygnus A appears as a giant, elliptical galaxy, centred on the small dot at the centre of this image. Observers: R. Perley, J. Dreher & J. Cowan. Taken 1979-83, all configurations with full 27 This picture may not be used to state or imply the endorsement by NRAO, AUI or NSF of any company or product.
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