Sao is basically an abbreviation that stands for the following terms Session-At-Once, which is a recording mode for all kinds of optical disc. It also stands as an abbreviation for Smithsonian Astrophysical Observatory of the Smithsonian Institution, which is located in Cambridge, Massachusetts. This observatory is a A russwian Academy of Sciences. It is considered to be a research institute. The research is mostly in the fields of astronomy, astrophysics, earth and space sciences, and science education. It was founded in the year 1890 by Smithsonian Secretary Samuel Pierpont Langley.
SAO also refers to Smithsonian Astrophysical Observatory Star Catalog.
SAO also refers to Smithsonian Astrophysical Observatory Star Catalog.