R2D2 is a period-8 oscillator that was found in the form shown in the infobox at right, but not named, by Peter Raynham in the early 1970s. The name derives from a form with a larger and less symmetric stator discovered later by Noam Elkies in August 1994, shown below.
Elkies' R2D2 stator from 1994 (which inspired the name)
Goldtiger997 found a 86-glider synthesis for this oscillator on March 7, 2020.
- 29P8.2 at Heinrich Koenig's Game of Life Object Catalogs