ECHO horn antenna. This horn reflector antenna at Bell Telephone Laboratories in Holmdel,New Jersey,USA,was built in 1959. It was used for pioneering work with NASA's ECHO balloon satellites. Aluminium with a steel base,it is over 15 metres long and weighs 18 tons. It was later modified to work with Telstar communication satellites. It is most famous for its use in 1963-4 by US astrophysicists Robert W. Wilson and Arno A. Penzias to unexpectedly discover the microwave background radiation from the Big Bang origin of the universe. In 1990 it was designated a US National Historic Landmark. Photographed in June 1962 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / NASA |
Bildgröße: | 3333 px × 2622 px |
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