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Solar eclipse of June 30, 1973

A total solar eclipse occurred at the Moon's descending node of orbit on Saturday, June 30, 1973, with a magnitude of 1.0792. A solar eclipse occurs when the Moon passes between Earth and the Sun, thereby totally or partly obscuring the image of the Sun for a viewer on Earth. A total solar eclipse occurs when the Moon's apparent diameter is larger than the Sun's, blocking all direct sunlight, turning day into darkness. Totality occurs in a narrow path across Earth's surface, with the partial solar eclipse visible over a surrounding region thousands of kilometres wide. Occurring about 11 hours after perigee, the Moon's apparent diameter was larger.

Observations
This eclipse was observed by a group of scientists, which included Donald Liebenberg, from the Los Alamos National Laboratory. They used two airplanes to extend the apparent time of totality by flying along the eclipse path in the same direction as the Moon's shadow as it passed over Africa. One of the planes was a prototype (c/n 001) of what was later to become the Concorde, which has a top speed of almost (Mach 2). This enabled scientists from Los Alamos, the Paris Observatory, the Kitt Peak National Observatory, Queen Mary University of London, the University of Aberdeen and CNRS to extend totality to more than 74 minutes; nearly 10 times longer than is possible when viewing a total solar eclipse from a stationary location. The Concorde was specially modified with rooftop portholes for the mission, and is currently on display with the Solar Eclipse mission livery at Musée de l’air et de l’espace. The data gathered resulted in three papers published in Nature and a book. The eclipse was also observed by a charter flight from Mount San Antonio College in Southern California. The DC-8 with 150 passengers intercepted the eclipse at just off the east coast of Africa and tracked the eclipse for three minutes. The passengers rotated seats every 20 seconds so that each passenger had three 20 second opportunities at the window to observe and take pictures. A separate observation opportunity was provided on a specialized commercial cruise by the S.S. Canberra, which traveled from New York City to the Canary Islands and Dakar, Senegal, observing 5 minutes and 44 seconds of totality out in the Atlantic between those two stops in Africa. The cruise's passengers included notable people in the scientific community such as Neil Armstrong, Scott Carpenter, Isaac Asimov, Walter Sullivan, and the then 15-year old Neil deGrasse Tyson. Gallery File:Madagascar74.104.jpg|From Manafiafy, Madagascar File:Ecl73-1 (4321619182).jpg|As seen off the Mauritanian coast File:Eclipse à Moussoro.jpg|From Moussoro, Chad == Eclipse details ==
Eclipse details
Shown below are two tables displaying details about this particular solar eclipse. The first table outlines times at which the Moon's penumbra or umbra attains the specific parameter, and the second table describes various other parameters pertaining to this eclipse. == Eclipse season ==
Eclipse season
This eclipse is part of an eclipse season, a period, roughly every six months, when eclipses occur. Only two (or occasionally three) eclipse seasons occur each year, and each season lasts about 35 days and repeats just short of six months (173 days) later; thus two full eclipse seasons always occur each year. Either two or three eclipses happen each eclipse season. In the sequence below, each eclipse is separated by a fortnight. The first and last eclipse in this sequence is separated by one synodic month. == Related eclipses ==
Related eclipses
Eclipses in 1973 An annular solar eclipse on January 4. • A penumbral lunar eclipse on January 18. • A penumbral lunar eclipse on June 15. • A total solar eclipse on June 30.A penumbral lunar eclipse on July 15. • A partial lunar eclipse on December 10. • An annular solar eclipse on December 24. Metonic • Preceded by: Solar eclipse of September 11, 1969 • Followed by: Solar eclipse of April 18, 1977 Tzolkinex • Preceded by: Solar eclipse of May 20, 1966 • Followed by: Solar eclipse of August 10, 1980 Half-Saros • Preceded by: Lunar eclipse of June 25, 1964 • Followed by: Lunar eclipse of July 6, 1982 Tritos • Preceded by: Solar eclipse of July 31, 1962 • Followed by: Solar eclipse of May 30, 1984 Solar Saros 136 • Preceded by: Solar eclipse of June 20, 1955 • Followed by: Solar eclipse of July 11, 1991 Inex • Preceded by: Solar eclipse of July 20, 1944 • Followed by: Solar eclipse of June 10, 2002 Triad • Preceded by: Solar eclipse of August 29, 1886 • Followed by: Solar eclipse of April 30, 2060 Solar eclipses of 1971–1974 Saros 136 Metonic series Tritos series Inex series ==Notes==
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