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A total solar eclipse occurred on Thursday, May 29, 1919. With the duration of totality at maximum eclipse of 6 minutes 50.75 seconds, it was the longest solar eclipse since May 27, 1416. A longer total solar eclipse would later occur on June 8, 1937. As it occurred only 0.8 days after perigee (May 28), the Moon's apparent diameter was larger. It was visible throughout most of
South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a relatively small portion in the Northern Hemisphere at the northern tip of the continent. It can also be described as the sout ...
and
Africa Africa is the world's second-largest and second-most populous continent, after Asia in both cases. At about 30.3 million km2 (11.7 million square miles) including adjacent islands, it covers 6% of Earth's total surface area ...
as a partial eclipse. Totality occurred through a narrow path across southeastern
Peru , image_flag = Flag of Peru.svg , image_coat = Escudo nacional del Perú.svg , other_symbol = Great Seal of the State , other_symbol_type = National seal , national_motto = "Firm and Happy f ...
, northern
Chile Chile, officially the Republic of Chile, is a country in the western part of South America. It is the southernmost country in the world, and the closest to Antarctica, occupying a long and narrow strip of land between the Andes to the east a ...
, central Bolivia and
Brazil Brazil ( pt, Brasil; ), officially the Federative Republic of Brazil (Portuguese: ), is the largest country in both South America and Latin America. At and with over 217 million people, Brazil is the world's fifth-largest country by area ...
after sunrise, across the Atlantic Ocean and into south central Africa, covering southern Liberia, southern French West Africa (the part now belonging to Ivory Coast), southwestern tip of
British Gold Coast The Gold Coast was a British Crown colony on the Gulf of Guinea in West Africa from 1821 until its independence in 1957 as Ghana. The term Gold Coast is also often used to describe all of the four separate jurisdictions that were under the ad ...
(now
Ghana Ghana (; tw, Gaana, ee, Gana), officially the Republic of Ghana, is a country in West Africa. It abuts the Gulf of Guinea and the Atlantic Ocean to the south, sharing borders with Ivory Coast in the west, Burkina Faso in the north, and To ...
), Príncipe Island in
Portuguese São Tomé and Príncipe São Tomé and Príncipe islands were a colony of the Portuguese Empire from its discovery in 1470 until 1975, when independence was granted by Portugal. History The Portuguese explorers João de Santarém and Pêro Escobar discovered the is ...
, southern
Spanish Guinea Spanish Guinea (Spanish language, Spanish: ''Guinea Española'') was a set of Insular Region (Equatorial Guinea), insular and Río Muni, continental territories controlled by Spain from 1778 in the Gulf of Guinea and on the Bight of Bonny, in ...
(now Equatorial Guinea),
French Equatorial Africa French Equatorial Africa (french: link=no, Afrique-Équatoriale française), or the AEF, was the federation of French colonial possessions in Equatorial Africa, extending northwards from the Congo River into the Sahel, and comprising what are ...
(the parts now belonging to
Gabon Gabon (; ; snq, Ngabu), officially the Gabonese Republic (french: République gabonaise), is a country on the west coast of Central Africa. Located on the equator, it is bordered by Equatorial Guinea to the northwest, Cameroon to the nort ...
and R. Congo, including Libreville),
Belgian Congo The Belgian Congo (french: Congo belge, ; nl, Belgisch-Congo) was a Belgian colony in Central Africa from 1908 until independence in 1960. The former colony adopted its present name, the Democratic Republic of the Congo (DRC), in 1964. Colo ...
(now DR Congo), northeastern Northern Rhodesia (now
Zambia Zambia (), officially the Republic of Zambia, is a landlocked country at the crossroads of Central, Southern and East Africa, although it is typically referred to as being in Southern Africa at its most central point. Its neighbours are t ...
), northern tip of
Nyasaland Nyasaland () was a British protectorate located in Africa that was established in 1907 when the former British Central Africa Protectorate changed its name. Between 1953 and 1963, Nyasaland was part of the Federation of Rhodesia and Nyasala ...
(now
Malawi Malawi (; or aláwi Tumbuka: ''Malaŵi''), officially the Republic of Malawi, is a landlocked country in Southeastern Africa that was formerly known as Nyasaland. It is bordered by Zambia to the west, Tanzania to the north and northeas ...
), German East Africa (now belonging to
Tanzania Tanzania (; ), officially the United Republic of Tanzania ( sw, Jamhuri ya Muungano wa Tanzania), is a country in East Africa within the African Great Lakes region. It borders Uganda to the north; Kenya to the northeast; Comoro Islands ...
) and northeastern
Portuguese Mozambique Portuguese Mozambique ( pt, Moçambique) or Portuguese East Africa (''África Oriental Portuguesa'') were the common terms by which Mozambique was designated during the period in which it was a Portuguese colony. Portuguese Mozambique originally ...
(now
Mozambique Mozambique (), officially the Republic of Mozambique ( pt, Moçambique or , ; ny, Mozambiki; sw, Msumbiji; ts, Muzambhiki), is a country located in southeastern Africa bordered by the Indian Ocean to the east, Tanzania to the north, Malawi ...
), ending near sunset in eastern Africa. There was another solar eclipse in 1919, an annular solar eclipse on
November 22 Events Pre-1600 * 498 – After the death of Anastasius II, Symmachus is elected Pope in the Lateran Palace, while Laurentius is elected Pope in Santa Maria Maggiore. * 845 – The first duke of Brittany, Nominoe, defeats the Fra ...
.


Observations

Albert Einstein's prediction of the bending of light by the gravity of the Sun, one of the components of his
general theory of relativity General relativity, also known as the general theory of relativity and Einstein's theory of gravity, is the differential geometry, geometric scientific theory, theory of gravitation published by Albert Einstein in 1915 and is the current descr ...
, can be tested during a solar eclipse, when stars with
apparent position The apparent place of an object is its position in space as seen by an observer. Because of physical and geometrical effects it may differ from the "true" or "geometric" position. Astronomy In astronomy, a distinction is made between the ''mean ...
near the sun become visible. Following an unsuccessful attempt to validate this prediction during the
Solar eclipse of June 8, 1918 A total solar eclipse occurred on Saturday, June 8, 1918. The eclipse was viewable across the entire contiguous United States, an event which would not occur again until the solar eclipse of August, 2017. The path The path of totality started ...
, two expeditions were made to measure positions of stars during this eclipse (see
Eddington experiment The Eddington experiment was an observational test of general relativity, organised by the British astronomers Frank Watson Dyson and Arthur Stanley Eddington in 1919. The observations were of the Solar eclipse of May 29, 1919, total solar eclip ...
). They were organized under the direction of Sir Frank Watson Dyson. The first was led by
Sir Arthur Eddington Sir Arthur Stanley Eddington (28 December 1882 – 22 November 1944) was an English astronomer, physicist, and mathematician. He was also a philosopher of science and a populariser of science. The Eddington limit, the natural limit to the lumi ...
to the island of Príncipe (off the west coast of Africa), the second by Andrew Claude de la Cherois Crommelin and Charles Rundle Davidson to Sobral in Brazil. The
stars A star is an astronomical object comprising a luminous spheroid of plasma held together by its gravity. The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night, but their immense distances from Earth ma ...
that both expeditions observed were in the constellation
Taurus Taurus is Latin for 'bull' and may refer to: * Taurus (astrology), the astrological sign * Taurus (constellation), one of the constellations of the zodiac * Taurus (mythology), one of two Greek mythological characters named Taurus * '' Bos tauru ...
.


Related eclipses


Solar eclipses 1916–1920


Saros 136


Inex series


Notes


References


NASA chart and statistics



Wired.com: May 29, 1919: A Major Eclipse, Relatively Speaking


{{DEFAULTSORT:Solar Eclipse Of May 29, 1919 1919 in science 1919 05 29 Príncipe Tests of general relativity Articles containing video clips May 1919 events