|View animated image|
|View static image|
|Number of cells||28|
|Bounding box||13 × 13|
|Discovered by||Jan Kok|
|Year of discovery||1971|
Kok's galaxy serves as the logo of Golly.
Uses in catalysis
Kok's galaxy is one of the strongest p8 sparkers of its size, and is notable for allowing a reaction by Dave Buckingham and simplified by Bill Gosper that converts a pi heptomino to a heavyweight spaceship when paired with a boat:
|A p48 HWSS gun using Kok's galaxy and two period-48 glider guns|
(click above to open LifeViewer)
RLE: here Plaintext: here
The period-856 glider gun uses four, which serve as sparkers and also delete gliders.
In September 2003 Jason Summers found a 12-glider synthesis of this oscillator. An 11-glider synthesis was found by chris_c in May 2016. On December 23, 2022, Chris857 found a 10-glider synthesis for the oscillator based on an occurrence in a symmetric soup. Several previously known 11-glider recipes work via perturbing a constellation of two beehives using eight gliders.
- See also: List of common oscillators
Kok's galaxy is still yet to occur naturally. Catagolue has a dedicated badge which will be given out to anyone who discovers one. In odd-width 90° rotationally symmetric soups (C4_1), about 1 in 100000 soups will form a Kok's galaxy in the centre, and in 180° ones (C2_1), about 1 in 230 million soups.
- Robert Wainwright (September 1971). Lifeline, vol 3, page 4.
- Dean Hickerson's oscillator stamp collection. Retrieved on March 14, 2020.
- Jason Summers' jslife pattern collection.
- chris_c (May 31, 2016). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- Chris857 (December 23, 2022). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums
- Dave Greene (February 2, 2022). Re: Synthesising Oscillators (discussion thread) at the ConwayLife.com forums