Moons of Mars. The two moons of Mars are Phobos and Deimos. Both moons were discovered in 1877 by Asaph Hall and are named after the characters Phobos (panic/fear) and Deimos (terror/dread) who, in Greek mythology, accompanied their father Ares, god of war, into battle. Ares was known as Mars to the Romans.
A triangular prism is a prism composed of two triangular bases and three rectangular sides. It is a pentahedron. It is implemented in the Wolfram Language as PolyhedronData[TriangularPrism]. The triangular prism has nine distinct nets, as illustrated above.
Similarly a prism with rectangular base is a rectangular prism. A special rectangular prism with square base is called a cube. A pentagonal prism has base of a pentagon and a hexagonal prism has base of a hexagon. All prisms have two bases of same shape and the sides faces are all rectangles.