Jaan Einasto (born 23 February 1929, in Tartu) is an Estonian astrophysicist and one of the discoverers of the large-scale structure of the Universe. He is a patriotic Estonian; the name "Einasto" is an anagram of "Estonia".
Born in Tartu, he attended the University of Tartu, where he received the Ph.D. equivalent in 1955 and a senior research doctorate in 1972. From 1952, he has worked as a scientist at the Tartu Observatory (1977–1998) Head of the Department of Cosmology; in 1992-1995, he was Professor of Cosmology at the University of Tartu. For a long time, he was Head of the Division of Astronomy and Physics of the Estonian Academy of Sciences in Tallinn. Einasto is a member of the Academia Europaea, the European Astronomical Society and the Royal Astronomical Society; he has received three Estonian National Science Awards.
- 1947 Tartu Secondary School No. 1
- 1952 University of Tartu
- 1955 Cand.Sc. in physics and mathematics
- 1972 D.Sc. in physics and mathematics
- 1992 Professor
- 1991 Member of Academia Europaea
- 1994 Member of the Royal British Society of Astronomy
The asteroid 11577 Einasto, discovered in 1994, is named in his honour.