Credit & Copyright: Rick Scott
Explanation:
Since the early days of
radio and television
we have been freely broadcasting signals into space.
For some time now,
we have been listening too.
Ohio State University's radio telescope,
affectionately known as "The Big Ear" ,
was one of the first and largest listeners.
Designed by John Kraus, OSU's Big Ear (about the size of three
football fields) consisted of an immense metal ground plane with
two fence-like reflectors (one fixed and one tiltable) and
relied on
the Earth's rotation to help scan the sky.
This photo, taken by former Big Ear student volunteer Rick Scott,
looks out across the ground plane toward the fixed reflector with the
"receiver horns" in the foreground.
This May, the final pieces of the Big Ear were torn down, but its
explorations of the radio universe will be long remembered.
Starting in 1965, the Big Ear was used in an ambitious premier survey of the radio sky, ultimately finding over 20,000 celestial radio sources. Changing its focus in the 1970s, it became the first telescope to continuously listen for signals from extraterrestrial civilizations. For an exciting moment during August 1977 a very strong and unanticipated signal, dubbed the Wow! Signal, was detected by the Big Ear. But alas, heard only once, the cause of the signal could not be determined.
1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 |
Январь Февраль Март Апрель Май Июнь Июль Август Сентябрь Октябрь Ноябрь Декабрь |
NASA Web Site Statements, Warnings, and Disclaimers
NASA Official: Jay Norris. Specific rights apply.
A service of: LHEA at NASA / GSFC
& Michigan Tech. U.
|
Публикации с ключевыми словами:
SETI - radiotelescope - Радиотелескоп - Радиоизлучение из космоса - внеземные цивилизации
Публикации со словами: SETI - radiotelescope - Радиотелескоп - Радиоизлучение из космоса - внеземные цивилизации | |
См. также:
Все публикации на ту же тему >> | |
