Ernst Julius Öpik (22 October [O.S. 10 October] 1893 – 10 September 1985) was an Estonian astronomer and astrophysicist who spent the second half of his...

elder son of Liivi Öpik (née Vedo) and physicist Unno Öpik (19 October 1926 – 6 May 2005), and grew up there with sister Urve Öpik (born 1960, a psychotherapist)...

The Oort cloud (/ɔːrt, ʊərt/), sometimes called the Öpik–Oort cloud, is theorized to be a vast cloud of icy planetesimals surrounding the Sun at distances...

Öpik is an Estonian surname. Notable people with the surname include: Armin Öpik (1898–1983), Estonian/Australian paleontologist Ernst Öpik (1893–1985)...

proposed by Ernst Öpik and Jan Oort, and the Kuiper belt were the only reserves of comets in the Solar System. In 1932, Estonian astronomer Ernst Öpik hypothesized...

Uuno Öpik (a.k.a. Uno Öpik; 19 October 1926 in Tartu, Estonia - 30 April 2005 in Bath, UK) was an Estonian-born atomic physicist most of whose adult life...

Ernst Mayr, evolutionary biologist, influential in the philosophy of biology Ernst Neizvestny, Russian sculptor Ernst Öpik, Estonian astronomer Ernst...

Palomar Observatory in California, and named after Estonian astronomer Ernst Öpik. Öpik orbits the Sun in the inner main-belt at a distance of 1.5–3.1 AU once...

clouds in this galaxy, as well as the significant Doppler shift. In 1922 Ernst Öpik presented an elegant and simple astrophysical method to estimate the distance...

observations of the Andromeda Galaxy's significant Doppler shift. In 1922, Ernst Öpik presented a method to estimate the distance of Andromeda using the measured...