# Greenwich

*Observatory*

Royal Observatory, Greenwich

| | |
| --- | --- |
| Where it is | 51.4800° N, 0.0000° E |
| State | UK |
| What is done there | optical observatory |
| Still working | no |

Test ranges, observatories and ground stations are a hand-picked list kept in this project rather than a published catalogue: no catalogue answers which of the world's thousands of observing sites belong on a map of it. The article below is what lets the choice be argued with.

## What it is

The Royal Observatory, Greenwich (ROG; known as the Old Royal Observatory from 1957 to 1998, when the working Royal Greenwich Observatory, RGO, temporarily moved south from Greenwich to Herstmonceux) is an observatory situated on a hill in Greenwich Park in south east London, overlooking the River Thames to the north. It played a major role in the history of astronomy and navigation, and because the Prime Meridian passed through it, it gave its name to Greenwich Mean Time, the precursor to today's Coordinated Universal Time (UTC).

## Elsewhere

- This place on the live map: https://www.orbitalmap.space/?at=51.48,0.00
- The article this row is vouched by: https://en.wikipedia.org/wiki/Royal_Observatory,_Greenwich
- Every object: https://www.orbitalmap.space/o/
- What this site is and what it reads: https://www.orbitalmap.space/llms.txt

## Where this came from

Compiled 2026-09-17. Selected by hand for this project. Description from Wikipedia (en). Description: CC BY-SA 4.0.