Pattern · Spaceship
The Lightweight Spaceship (LWSS)
Where the glider glides diagonally, the lightweight spaceship travels in a straight line — faster, larger, and along an entirely different axis of Conway's Game of Life.
How It Differs From the Glider
The glider is the smallest spaceship, moving diagonally at a quarter of the theoretical maximum speed. The lightweight spaceship (LWSS) is the smallest of a different family entirely — one that moves orthogonally (straight along a row or column) rather than diagonally, and at c/2 rather than c/4, twice as fast. Its 9-cell shape regenerates itself shifted one cell in its direction of travel every 4 generations, the same self-perpetuating mechanism that makes the glider work, just applied to a larger, differently oriented pattern.
Why It Matters
The LWSS is the smallest member of a small family of named orthogonal spaceships — middleweight (MWSS) and heavyweight (HWSS) follow the same basic template at slightly larger sizes. Having both a diagonal (glider) and an orthogonal (LWSS) traveling pattern gave early Life researchers two independent "signal carriers" moving along different axes, which turned out to matter for building more complex engineered patterns that need traffic moving in more than one direction across the grid.
See It Live
Open the LWSS pre-loaded in Cellscape and press play — notice how it travels in a straight line rather than diagonally, and compare its speed directly against a glider on the same grid.
Frequently Asked Questions
How is the LWSS different from a glider?
A glider is 5 cells and moves diagonally at c/4. The LWSS is 9 cells and moves orthogonally (straight up, down, left, or right) at c/2 — twice as fast, in a straight rather than diagonal line, and along a different axis of movement entirely.
What does c/2 speed mean?
c is the fastest anything can move in the automaton — one cell per generation. The LWSS moves at half that: one cell every 2 generations, in the direction it's facing.
Are there other spaceships related to the LWSS?
Yes — the LWSS is the smallest of a family of orthogonal spaceships that also includes the middleweight spaceship (MWSS) and heavyweight spaceship (HWSS), each one cell wider and slightly different in exact shape, all moving at the same c/2 orthogonal speed.
Read more about spaceships and Game of Life mechanics in the complete guide, or browse the full pattern & rule gallery.