The crossword solutions for the term 'Mars or the Moon' are ORB and PLACEINSPACE. ORB is an abbreviation for 'orbiting body, ' which is a celestial object that orbits around a larger body, such as a planet or star. The Moon is an example of an orbiting body around Earth. PLACEINSPACE is a phrase that refers to the location of Mars and the Moon in space. Both Mars and the Moon are located in the Solar System, which is the collection of planets, moons, asteroids, and other objects that orbit around the Sun.