Smithsonian Astrophysical Observatory

Smithsonian Astrophysical Observatory is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Observatories

North American Industry Classification System (NAICS) Categories:

• All Other Amusement And Recreation Industries > Astronomy & Observatories

Standard Industry Classification (SIC) Categories:

• Amusement And Recreation Services, Nec > Astronomy & Observatories