- Star polygon (Wikipedia)
In geometry, a star polygon is a type of non-convex polygon. Regular star polygons have been studied in depth; while star polygons in general appear not to have been formally defined, certain notable ones can arise through truncation operations on regular simple or star polygons.
- Galaga (Wikipedia)
Galaga is a 1981 fixed shooter video game developed and published by Namco for arcades. In North America, it was released by Midway Manufacturing. It is the sequel to Galaxian (1979), Namco’s first major video game hit in arcades. Controlling a starship, the player is tasked with destroying the Galaga forces in each stage while avoiding enemies and projectiles. Some enemies can capture a player’s ship via a tractor beam, which can be rescued to transform the player into a “dual fighter” with additional firepower.