NASA is the "National Aeronautics and Space Administration." It is commonly abbreviated as "NASA."

The National Aeronautics and Space Administration, commonly known as NASA, is the United States government agency responsible for the nation's civilian space program and for aeronautics and aerospace research. Established on July 29, 1958, NASA conducts space exploration missions, scientific research, technology development, and advancements in aeronautics and spaceflight.

NASA's mission includes:

1. Space Exploration: NASA designs, launches, and operates spacecraft for exploring the Earth, Moon, Mars, and beyond. Landmark missions like the Apollo Moon landings, the Space Shuttle program, and the Mars rovers exemplify its dedication to exploring the cosmos.

2. Scientific Research: NASA conducts cutting-edge scientific research on topics such as climate change, Earth science, planetary science, and astrophysics. Space telescopes like the Hubble Space Telescope and the upcoming James Webb Space Telescope provide unprecedented views of the universe.

3. Human Spaceflight: NASA has been a pioneer in human spaceflight, sending astronauts into space aboard various spacecraft, including the Space Shuttle and the International Space Station (ISS). The agency is working on future crewed missions to the Moon and Mars.

4. Technology Development: NASA develops innovative technologies for space exploration, which often find applications in everyday life. Examples include satellite technology, GPS systems, and advancements in materials science.

5. Aeronautics Research: In addition to space exploration, NASA focuses on improving aviation through aeronautics research. This includes developing more fuel-efficient aircraft, improving air traffic management, and enhancing safety measures.

6. International Collaboration: NASA collaborates with space agencies from around the world on various missions and projects. The ISS, for instance, is a joint effort involving multiple international partners.

NASA's work has led to numerous scientific discoveries, technological innovations, and a deeper understanding of the universe. The agency's achievements continue to inspire and drive advancements in space exploration and scientific research on a global scale.