Lightweight spaceship
| Lightweight spaceship | |||||||||||
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| Pattern type | Spaceship | ||||||||||
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| Family | XWSS | ||||||||||
| Number of cells | 9 | ||||||||||
| Bounding box | 5×4 | ||||||||||
| Frequency class | 11.2 | ||||||||||
| Direction | Orthogonal | ||||||||||
| Period | 4 | ||||||||||
| Mod | 2 | ||||||||||
| Speed | c/2 | ||||||||||
| Speed (unsimplified) | 2c/4 | ||||||||||
| Heat | 11 | ||||||||||
| Discovered by | John Conway | ||||||||||
| Year of discovery | 1970 | ||||||||||
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The lightweight spaceship (commonly abbreviated to LWSS) or (rarely) small fish[1] is the smallest orthogonal spaceship, and the second most common spaceship after the glider. It moves at speed c/2 and has period 4 (and is therefore often referred to as 2c/4). It was found by John Conway in 1970.
Commonness
Random soups investigated by Achim Flammenkamp emitted one LWSS for approximately every 615 gliders.[2] The LWSS is also the eighteenth most common object on Adam P. Goucher's Catagolue.[3]
Tagalong
In April 1992, David Bell found a tagalong for two lightweight spaceships (or two middleweight spaceships or two heavyweight spaceships). It can be extended indefinitely by attaching it to the back of itself. Interestingly, a hivenudger with symmetric rear (that is, both rear spaceships being of same "weight") can pull this tagalong.
See also
- Fake xWSS
- Middleweight spaceship
- Heavyweight spaceship
- LWSS on MWSS 1
- LWSS on HWSS 1
- Lightweight emulator
- Toaster
- Infinite LWSS hotel
References
- ↑ "Small fish". The Life Lexicon. Stephen Silver. Retrieved on June 10, 2009.
- ↑ "Spontaneous appeared Spaceships out of Random Dust". Achim Flammenkamp (December 9, 1995). Retrieved on August 18, 2011.
- ↑ Adam P. Goucher. "Statistics". Catagolue. Retrieved on June 24, 2016.
External links
- LWSS at the Life Lexicon
- The Lightweight Spaceship (glider 1062) at David Eppstein's Glider Database
- LWSS on LWSS at Adam P. Goucher's Catagolue (pseudo-object)
- The 1 nine-bit spaceship at Mark D. Niemiec's Life Page
- 9P4H2V0.1 at Heinrich Koenig's Game of Life Object Catalogs
- Patterns
- Patterns with Catagolue frequency class 11.2
- Natural periodic objects
- Patterns with 9 cells
- Patterns found by John Conway
- Patterns found in 1970
- Patterns that can be constructed with 3 gliders
- Spaceships
- Periodic objects with minimum population 9
- Spaceships with period 4
- Orthogonal spaceships
- Spaceships with speed c/2
- Spaceships with unsimplified speed 2c/4
- Spaceships with heat 11
- XWSS variants
- Spaceships with mod 2
- Glide symmetric spaceships
