The full form of NASA is "National Aeronautics and Space Administration".
NASA is an agency of United States of America which is responsible for civilian space programme, Aeronautics as well as aerospace. NASA mainly focused on better understanding Earth through the Earth Observing System.NASA has conducted many manned and unmanned spaceflight programs throughout its history.
The manned programmes are :
1. X-15 rocket plane
2. Project Mercury
3. Project Gemini
4. Apollo program
5. Skylab
6. Apollo–Soyuz Test Project
and many more.
