Jan Hendrik Oort ForMemRS (/ˈɔːrt/ or /ˈʊərt/; 28 April 1900 – 5 November 1992) was a Dutch astronomer who made significant contributions to the understanding...

cloud was proposed in 1950 by the Dutch astronomer Jan Oort, in whose honor the idea was named. Oort proposed that the bodies in this cloud replenish and...

Oort is a Dutch toponymic surname most commonly referring to the astronomer Jan Oort. Oort was one spelling of a Middle Dutch word for 'edge' or 'end'...

September 19, 1915. It is one of 19 comets used in the original sample by Jan Oort for his hypothesis regarding the origin of long-period comets in 1950....

cloud (also called the inner Oort cloud and inner cloud) is a theoretical vast circumstellar disc, interior to the Oort cloud, whose outer border would...

interstellar hydrogen. After this line was discovered, he participated, with Jan Oort and Lex Muller, in the effort to use radio astronomy to map out the neutral...

populations. In the abstract of the article by Baade, he recognizes that Jan Oort originally conceived this type of classification in 1926. Baade observed...

Austrian mathematician and amateur astronomer MPC · 1690 1691 Oort 1956 RB Jan Oort (1900–1992), Dutch astronomer MPC · 1691 1692 Subbotina 1936 QD...

directed the observatory include Willem de Sitter, Ejnar Hertzsprung and Jan Oort. Leiden University established the observatory in 1633; astronomy had been...

The Oort limit is a theoretical location at the outer limits of the Oort cloud, where the amount of comets and minor planets orbiting the Sun drops drastically...

Chandrasekhar revised the models of stellar dynamics first outlined by Jan Oort and others by considering the effects of fluctuating gravitational fields...

astronomer Jan Oort. is a member of the Themis family, a dynamical family of outer-belt asteroids with nearly coplanar ecliptical orbits. Oort orbits the...

following year. He then commenced doctoral studies at Leiden University under Jan Oort. Schmidt was awarded a Doctor of Philosophy from Leiden Observatory in...

and social worker Jan Oblak (born 1993), Slovenian professional footballer (goalkeeper) Jan Oort (1900–1992), Dutch astronomer Jan Õun (born 1977), Estonian...

1951. Using the radio telescope at the Kootwijk Observatory, Muller and Oort reported the detection of the hydrogen emission line in May of that same...

(1920s), with some plausibility by 1939, and beyond reasonable doubt by Jan Oort in 1942. In 1921, Carl Otto Lampland was the first to announce that he...

dynamics (MOND), which involves modifying the laws of gravity. In 1932, Jan Hendrik Oort became the first to report that measurements of the stars in the solar...

(The existence of two distinct populations had been noted earlier by Jan Oort.) Baade also discovered that there were two types of Cepheid variable stars...

is the Oort cloud, possibly a spherical swarm of comets extending beyond 50,000 AU from the Sun first hypothesised by Dutch astronomer Jan Oort in 1950...

The Oort constants (discovered by Jan Oort) A {\displaystyle A} and B {\displaystyle B} are empirically derived parameters that characterize the local...

distance from the galactic core. This deduction was soon confirmed by Jan Oort in 1927. A certain class of resonances in rotating stellar or gaseous disks...

observed. Dutch radio astronomy pioneer Jan Oort also hypothesized the existence of dark matter in 1932. Oort was studying stellar motions in the galactic...

understand this. You are writing for [astronomer] Jan Oort – and that's all right, if you want to write for Jan Oort, write another book, but don't put it in our...

taught by Ejnar Hertzsprung, Antonie Pannekoek, Willem de Sitter, Jan Woltjer, Jan Oort, and the physicist Paul Ehrenfest. He received his candidate degree...

Observatory in South Africa. The asteroid was named after Mieke Oort, wife of Dutch astronomer Jan Oort. The S-type asteroid is a member of the Eos family, thought...

ultimately led to the finding of galactic rotation by Bertil Lindblad and Jan Oort.[citation needed] In 1917, Heber Doust Curtis had observed the nova S Andromedae...

lines. Lynds was the first to describe them as the "Lyman-alpha forest". Jan Oort argued that the absorption features are due not to any physical interactions...

ultimately led to the finding of galactic rotation by Bertil Lindblad and Jan Oort. In 1906, Kapteyn launched a plan for a major study of the distribution...

1992 – Arpad Elo, American physicist and chess player (b. 1903) 1992 – Jan Oort, Dutch astronomer and academic (b. 1900) 1996 – Eddie Harris, American...

Telfer as the voice of an angry scholar Michael Chochol as the voice of Jan Oort Kirsten Dunst as the voice of Cecilia Payne-Gaposchkin Cary Elwes as the...