Space travel
Space Travel
Space travel (pronunciation: /speɪs ˈtrævəl/) refers to the process of traveling beyond the Earth's atmosphere using various types of spacecraft. The concept has been a significant part of human imagination and scientific inquiry for centuries, and became a reality in the mid-20th century.
Etymology
The term "space travel" is derived from the English words "space", meaning the expanse that exists beyond the Earth and between celestial bodies, and "travel", meaning to go from one place to another. The term was first used in the context of traveling beyond the Earth's atmosphere in the early 20th century.
Related Terms
- Astronaut: A person who is trained to travel in a spacecraft.
- Spacecraft: A vehicle designed for space travel.
- Orbit: The curved path of a celestial object or spacecraft around a star, planet, or moon.
- Extravehicular activity: Any activity done by an astronaut or cosmonaut outside a spacecraft beyond the Earth's appreciable atmosphere.
- Space station: A large spacecraft that remains in low Earth orbit for extended periods of time.
- Space exploration: The discovery and exploration of celestial structures in outer space by means of evolving and growing space technology.
See Also
- History of space travel
- Human spaceflight
- Interplanetary travel
- Interstellar travel
- Intergalactic travel
External links
- Medical encyclopedia article on Space travel
- Wikipedia's article - Space travel
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