Ernst Julius Öpik (1893 to 1985) was an Estonian astronomer and astrophysicist born in Kunda, who studied at the University of Moscow and took his doctorate at the University of Tartu in 1923. He is best known for his work on solar system dynamics, including the Oort cloud, which is also called the Öpik-Oort cloud in his honour, and for reviving interest in the Yarkovsky effect. In 1922 he estimated the distance to the Andromeda Galaxy from rotational velocities. He fled Estonia in 1944, spent the second half of his career at the Armagh Observatory in Northern Ireland from 1948 to 1981 and edited the Irish Astronomical Journal.
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Source Ernst Öpik (Wikipedia)Lead, nationalityQuote, Lead, nationality
was an Estonian astronomer and astrophysicist
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1. MacTutor History of Mathematics Archive, University of St Andrews: Ernst Öpik
MacTutor History of Mathematics Archive, University of St AndrewsQuick Info, born
22 October 1893
Summary, field
Ernst Öpik was an Estonian astronomer who specialised in the study of minor bodies
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He spent the second half of his career in Northern Ireland
View the Source Ernst Öpik (Wikipedia)
Lead, nationality
was an Estonian astronomer and astrophysicist
Works In: Astronomy, Lead, discipline
was an Estonian astronomer and astrophysicist
Member Of: Moscow State University, Education
He went to the University of Moscow to specialize in the study of minor bodies
In Group: Planetary Science And Solar System Astronomy, Lead, solar system dynamics
best known for his pioneering work on solar system dynamics
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