Skip to main content
Select Source:

Royal Greenwich Observatory

Royal Greenwich Observatory, astronomical observatory established in 1675 by Charles II of England; formerly known as the Royal Observatory and located at Greenwich, it moved to Herstmonceux Castle, Sussex, in 1946. In the 1990 new headquarters at Cambridge were opened. Its equipment includes the 98-in. (248.9-cm) Isaac Newton reflecting telescope, 36-in. (91.4-cm) and 30-in. (76.2-cm) reflecting telescopes, 26-in. (66-cm) and 13-in. (33-cm) refracting telescopes, and an 8-in. (20.3-cm) reversible transit circle. The observatory is administratively responsible for the Radcliffe Observatory, Pretoria, South Africa, where there is a 74-in. (188-cm) reflector. The Royal Greenwich Observatory also includes the Nautical Almanac Office, which publishes the national navigational almanacs, and is responsible for the national time service, on which is based the worldwide system of time zones. The zero meridian, from which longitude is measured, passes through the observatory's former location at Greenwich. Other principal programs include measurement of the proper motions and radial velocities of stars, studies of the dynamics of the solar system and the Milky Way, and studies of the abundances of chemical elements in stars. From the appointment of John Flamsteed as its first director until 1972, the director of the observatory held the title of astronomer royal. Among the noted directors have been Flamsteed, Edmond Halley, James Bradley, Nevil Maskelyne, G. B. Airy, and E. Margaret Burbidge, who was the first director not to be astronomer royal.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Royal Greenwich Observatory." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. 25 Feb. 2018 <http://www.encyclopedia.com>.

"Royal Greenwich Observatory." The Columbia Encyclopedia, 6th ed.. . Encyclopedia.com. (February 25, 2018). http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/royal-greenwich-observatory

"Royal Greenwich Observatory." The Columbia Encyclopedia, 6th ed.. . Retrieved February 25, 2018 from Encyclopedia.com: http://www.encyclopedia.com/reference/encyclopedias-almanacs-transcripts-and-maps/royal-greenwich-observatory

Learn more about citation styles

Citation styles

Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

http://www.mla.org/style

The Chicago Manual of Style

http://www.chicagomanualofstyle.org/tools_citationguide.html

American Psychological Association

http://apastyle.apa.org/

Notes:
  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.

Royal Greenwich Observatory

Royal Greenwich Observatory UK national astronomical observatory, founded at Greenwich, London, in 1675. After World War II, the observatory moved to Herstmonceux in Sussex and, in 1990, it relocated to Cambridge.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"Royal Greenwich Observatory." World Encyclopedia. . Encyclopedia.com. 25 Feb. 2018 <http://www.encyclopedia.com>.

"Royal Greenwich Observatory." World Encyclopedia. . Encyclopedia.com. (February 25, 2018). http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/royal-greenwich-observatory

"Royal Greenwich Observatory." World Encyclopedia. . Retrieved February 25, 2018 from Encyclopedia.com: http://www.encyclopedia.com/environment/encyclopedias-almanacs-transcripts-and-maps/royal-greenwich-observatory

Learn more about citation styles

Citation styles

Encyclopedia.com gives you the ability to cite reference entries and articles according to common styles from the Modern Language Association (MLA), The Chicago Manual of Style, and the American Psychological Association (APA).

Within the “Cite this article” tool, pick a style to see how all available information looks when formatted according to that style. Then, copy and paste the text into your bibliography or works cited list.

Because each style has its own formatting nuances that evolve over time and not all information is available for every reference entry or article, Encyclopedia.com cannot guarantee each citation it generates. Therefore, it’s best to use Encyclopedia.com citations as a starting point before checking the style against your school or publication’s requirements and the most-recent information available at these sites:

Modern Language Association

http://www.mla.org/style

The Chicago Manual of Style

http://www.chicagomanualofstyle.org/tools_citationguide.html

American Psychological Association

http://apastyle.apa.org/

Notes:
  • Most online reference entries and articles do not have page numbers. Therefore, that information is unavailable for most Encyclopedia.com content. However, the date of retrieval is often important. Refer to each style’s convention regarding the best way to format page numbers and retrieval dates.
  • In addition to the MLA, Chicago, and APA styles, your school, university, publication, or institution may have its own requirements for citations. Therefore, be sure to refer to those guidelines when editing your bibliography or works cited list.