Gemini

Gemini is the first oblique spaceship to be constructed, and was created by Andrew J. Wade in 2010.[1][2] It displaces itself by 5,120 cells vertically and 1,024 cells horizontally every 33,699,586 generations, and is therefore an ibisship. 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.

Gemini
View static image
Pattern type Spaceship
Number of cells 846278
Bounding box 4217807×4220191
Direction Oblique
Slope 5
Period 33699586
Mod 33699586
Speed (2560,512)c/16849793
Speed (unsimplified) (5120,1024)c/33699586
Heat Unknown
Discovered by Andrew J. Wade
Year of discovery 2010

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 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.[3] In June 2010, Greene also constructed slope-2 and slope-3 versions of the spaceship.[4][5]

Gemini was voted Pattern of the Year 2010 on the ConwayLife.com forums.[6]

Videos
<iframe src='//www.youtube.com/embed/X3wsFnwWK7E?' width='300' height='169' frameborder='0' allowfullscreen='true'></iframe>
Various zoom levels of gemini demonstrating its size
<iframe src='//www.youtube.com/embed/A8B5MbHPlH0?' width='300' height='169' frameborder='0' allowfullscreen='true'></iframe>
Some of Gemini's features (with CA music)

Pattern files
gollark: Can you NOT simply buy a wireless card/USB stick/apiocuboid?
gollark: S is after R in the alphabet, so this is true.
gollark: Oh no, not ANOTHER locally-amnesticizing printer.
gollark: sporeball seems to have one of those outdated ones which just does plastic.
gollark: Based on orbital observation/laser satellite reports I checked.

See also

References
  1. Adam P. Goucher (May 19, 2010). "Oblique Life spaceship created". Game of Life News. Retrieved on May 21, 2010.
  2. Andrew J. Wade (May 18, 2010). Universal Constructor Based Spaceship (discussion thread) at the ConwayLife.com forums
  3. Adam P. Goucher (May 21, 2010). "Universal Constructor Based Spaceship". Retrieved on May 21, 2010.
  4. Dave Greene (June 13, 2010). Re: Shrinking Gemini: Four Ideas (discussion thread) at the ConwayLife.com forums
  5. Dave Greene (June 14, 2010). Re: Shrinking Gemini: Four Ideas (discussion thread) at the ConwayLife.com forums
  6. Adam P. Goucher (January 17, 2011). Re: Votes for Pattern of the Year 2010 (discussion thread) at the ConwayLife.com forums
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