Gemini
Gemini  
View static image  
Pattern type  Spaceship  

Number of cells  846278  
Bounding box  4217807×4220191  
Direction  Oblique  
Slope  5  
Period  33699586  
Mod  Unknown  
Speed  2560c/16849793  
Heat  Unknown  
Discovered by  Andrew J. Wade  
Year of discovery  2010  

Gemini is the first oblique spaceship to be constructed, and was created by Andrew J. Wade in 2010.^{[1]} It displaces itself by 5120 cells vertically and 1024 cells horizontally every 33,699,586 generations. It derives its name from the latin, gemini, meaning twins, describing its 2 identical halves, each of which contains three ChapmanGreene construction arms. A tape of gliders continually relays between the two halves, instructing each to delete its parent and construct a daughter configuration.
It is the largest spaceship in terms of its diameter and bounding box, but has a much smaller population than the Caterpillar.
The pattern marks the thirteenth explicitlyconstructed spaceship velocity, but facilitates an infinite range of related velocities. For example, Dave Greene has reduced its period by eight generations, whilst maintaining its displacement. Theoretically speaking, a Geminiesque spaceship could be constructed with any velocity slower than (but not equal to) (1,1)c/580^{[2]}.
Videos
Pattern files
See Also
References
 ↑ Adam P. Goucher (May 19, 2010). "Oblique Life spaceship created". Game of Life News. Retrieved on May 21, 2010.
 ↑ "Universal Constructor Based Spaceship". Retrieved on May 21, 2010.
External links
 New Scientist: First replicating creature spawned in life simulator
 downloadable zip of the Gemini RLE file (Google is not allowing to download the file, but you can Share>Email as attachment to yourself)
 Gemini RLE file with programs used to construct it (on Google docs so download quota may be exceeded by the time you attempt download.)
 Gemini RLE file with programs used to construct it (alternate download on drop.io)
 Patterns
 Spaceships
 Patterns with 1000 or more cells
 Spaceships with period 33699586
 Oblique spaceships
 Spaceships with slope 5
 Spaceships with speed 2560c/16849793
 Patterns found by Andrew J. Wade
 Patterns found in 2010
 Universal constructors
 Engineerable spaceships
 Spaceships with slope 2
 Spaceships with slope 3