oort

Thân thiện

Jan Oort calculated the rotation of the Milky Way galaxy.

Definition

Proper noun 1. A surname: Specifically, the surname of the Dutch astronomer Jan Hendrik Oort. 2. In astronomy: Used primarily in the term "Oort cloud," a theoretical spherical cloud of predominantly icy planetesimals proposed to surround the Sun at distances ranging from about 2,000 to 200,000 astronomical units (AU).

Usage Examples

• Proper noun (Person):
  • The Oort cloud is named after the astronomer Jan Oort.
• Proper noun (Astronomical feature):
  • Comets with long orbital periods are thought to originate in the Oort cloud.
  • Oort's work fundamentally changed our understanding of the structure of our galaxy.

Advanced Usage

• "Oort cloud object": An icy body, such as a comet, residing in or originating from the Oort cloud.
  • Scientists study Oort cloud objects to learn about the early solar system.

Variants and Related Words

• Oort cloud (noun phrase): The hypothesized distant cloud of icy objects surrounding the solar system.
  • The existence of the Oort cloud was postulated by Jan Oort.

Synonyms

• Jan Oort (when referring to the person)
• Oort cloud (when referring to the astronomical concept; there is no direct single-word synonym)

Notes on Meaning

The word "Oort" itself is almost exclusively used as a proper noun, either directly referring to the astronomer Jan Hendrik Oort or, more commonly, as part of the compound term "Oort cloud." It does not have a standalone common noun meaning.

Học thuật

Noun

1. Dutch astronomer who proved that the galaxy is rotating and proposed the existence of the Oort cloud (1900-1992)

Từ đồng nghĩa

• Oort
• Jan Hendrix Oort