Space flight refers to a journey or mission that involves traveling into outer space, either by human crews aboard spaceships or by robotic spacecraft. This type of travel is typically achieved through the use of rocket technology, which propels vehicles upward at extremely high speeds until they reach orbit around Earth or other celestial bodies such as the Moon or Mars. Space flight can be for various purposes including scientific research, exploration, satellite deployment and maintenance, human spaceflight programs, and military operations.