Hanbury Brown radio telescope at sunset, Australia

Hanbury Brown radio telescope at sunset, Australia

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Credit: JOHN MEAD/SCIENCE PHOTO LIBRARY

Caption: Radio telescope. The Hanbury Brown radio interfer- ometer near Narrabri, Australia, at sunset. The Hanbury Brown interferometer consists of six 22 metre diameter radio telescopes that are combined by a technique called aperture synthesis to simulate a giant telescope with a diameter of up to 6km. Five of the telescopes are mounted on a 3km track and the sixth is located 3km further west. A computer combines the signals to create a very high resolution image, which is used to measure the angular size of stars. Radio astronomy requires much larger telescopes than optical astronomy because the wavelength of radio waves is far greater than that of visible light.

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Keywords: aperture synthesis, astronomy, astrophysics, australia, hanbury brown, interfero., interferometry, observatory, radio astr, radio astrono., radio astronomy, radio telescope, sunset

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