|Number of cells||846278|
|Discovered by||Andrew J. Wade|
|Year of discovery||2010|
Gemini is the first oblique spaceship to be constructed, and was discovered by Andrew J. Wade in 2010. 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 Chapman-Greene construction arms. A tape of gliders continually relays between the two halves, instructing each to delete its parent and construct a daughter configuration.
The pattern marks the thirteenth explicitly-constructed 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 Gemini-esque spaceship could be constructed with any velocity slower than (but not equal to) (1,1)c/580.
- 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.
- 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)