There are various synonymic expressions that can be used to refer to a 'space person'. Some of the most commonly used ones include astronaut, cosmonaut, spaceman, and spacewoman. An astronaut is a person who travels in a spacecraft beyond the Earth's atmosphere. Similarly, a cosmonaut is a Russian astronaut, and a spaceman or spacewoman is a person who works in or travels to space. Other phrases that denote a space person are 'space explorer' and 'space traveler'. Regardless of the term used, it's always fascinating to think about the brave souls who venture out beyond our planet to explore the unknown reaches of the universe.