The middleweight spaceship (or MWSS for short, or medium fish) is the third most common spaceship (after the glider and lightweight spaceship). It occurs about one fourth as commonly as the LWSS. It was found by John Conway in 1970 and travels at c/2 orthogonally. It can support various non-standard components, such as pushalong 1.
- ↑ "Spontaneous appeared Spaceships out of Random Dust". Achim Flammenkamp (December 9, 1995). Retrieved on August 18, 2011.
- 11P4H2V0.1 at Heinrich Koenig's Game of Life Object Catalogs