Radio picture of the Sun, made at centimetre wavelength by the Effelsberg radio telescope near Bonn, Germany on March 13th 1979. Radio emission at

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Radio picture of the Sun, made at centimetre wavelength by the Effelsberg radio telescope near Bonn, Germany on March 13th 1979. Radio emission at this wavelength comes from hot gas just above the photosphere and the Sun's disc appears roughly the same size as in optical photographs. The colour coding ranges from blue for the lowest emission, through green and yellow to red for the highest emission. The red spots are clouds of hot gas trapped in the magnetic field above solar active regions; a simultaneous optical photo would show sunspots beneath each.

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Size: 4470px × 3868px
Photo credit: © MAX-PLANCK-INSTITUTE FOR RADIO ASTRONOMY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: active, astronomy, cosmology, effelsberg, ima, image, imagery, picture, radio, region, science, solar, sun, sunspot