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...

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

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'...

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...

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...

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

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

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

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