what is its full form?
National Aeronautics and Space Administration
NASA
The National Aeronautics and Space Administration (NASA; ) is an independent agency of the U.S. Federal Government responsible for the civilian space program, as well as aeronautics and space research.
which planet is mercury? The smallest and innermost planet in the Solar System. can you describe its surface structure in few words? Mercury's surface is similar in appearance to that of the Moon, showing extensive mare-like plains and heavy cratering, indicating that it has been geologically inactive for billions of years is there any astronomer who visited it or had run a research on it? Yes, ancient astronomers made observations of Mercury can you name any two space probes which may have been used in its study? "Mariner 10" and "MESSENGER" please mention at least one of those observations? Mercury's apparent magnitude is calculated to vary between −2.48 around superior conjunction and +7.25 around inferior conjunction. who launched the former probe? NASA
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NASA [SEP] Introduction
The National Aeronautics and Space Administration (NASA; ) is an independent agency of the U.S. Federal Government responsible for the civilian space program, as well as aeronautics and space research. NASA was established in 1958, succeeding the National Advisory Committee for Aeronautics (NACA). The new agency was to have a distinctly civilian orientation, encouraging peaceful applications in space science. Since its establishment, most US space exploration efforts have been led by NASA, including the Apollo Moon landing missions, the Skylab space station, and later the Space Shuttle. NASA is supporting the International Space Station and is overseeing the development of the Orion spacecraft, the Space Launch System, and Commercial Crew vehicles.