LifeWiki:Did you know/183

… that all orthogonal spaceships with the unsimplified speed c/n are known to exist in range-1 isotropic cellular automata as true period c orthogonal c/2 orthogonal and c/3 orthogonal spaceships are known, [[all c/n speeds where n is even and greater than 3 can be constructed using the rule B2c3ae4ai56c/S2-kn3-enq4, while all c/n speeds where n is odd and greater than 4 can be constructed using the rule B2c3aj4nrt5i6c78/S1c23enr4aet5-iq67?