Ananke is an irregular outer moon of Jupiter, discovered by Seth Nicholson at the Mount Wilson Observatory in 1951. It travels on a distant, inclined orbit in the retrograde direction, and it gives its name to the Ananke group, a family of moons with similar orbits that are thought to be fragments of a single captured body broken apart by collisions. Ananke itself is only a few tens of kilometres across. It was known as Jupiter XII until 1975, when it received the name of the Greek goddess of necessity and compulsion.
Before and after
- 20 August 1951Birth of Mohamed Morsi
- 1 September 1951ANZUS
- 8 September 1951Treaty of San Francisco
- 8 September 1951Security Treaty Between the United States and Japan
- 28 September 1951Discovery of Ananke
- 29 September 1951Birth of Michelle Bachelet
- 2 October 1951Birth of Sting
- 1952Polio vaccine
- 1952Discovery of einsteinium
More in Universe & space
- 16 February 1948Discovery of Miranda
- 5 September 1977Launch of Voyager 1
- 4 March 1979Discovery of Metis
- 5 March 1979Discovery of Thebe
- 8 July 1979Discovery of Adrastea
- 25 December 2021Launch of James Webb Space Telescope
The era
This moment belongs to the Contemporary world (1945 CE to today), the world since 1945. You can also browse everything in the 20th century.