• Physical Sciences/Earth Sciences Research and Promotion

• 91.

American Institute of Aeronautics and Astronautics

The American Institute of Aeronautics and Astronautics.

• Astronomy (includes Observatories)

• 92.

HAMPTONS OBSERVATORY

Hamptons Observatory (aka Montauk Observatory) ia 501(c)(3) NYS nonprofit est.

• Physical Sciences/Earth Sciences Research and Promotion

• 93.

Virginia Air & Space Center Opportunity Program

The official visitor center for the NASA Langley Research Center.

Barnard Astronomical Society

The Barnard Astronomical Society is a member of the Astronomical League and located in Chattanooga, Tennessee.

• Science, General (includes Interdisciplinary Scientific Activities)

• 95.

Single Event Effects Symposium

Operate a scientific meeting. May 1216 2025 Marriott La Jolla in San Diego California The 2025 Single Event Effects Symposium SEE and Military and Aerospace Programmable Logic Devices MAPLD Workshop will be held jointly May 1216 2025 at the Marriott Hotel in La Jolla CA.

Carnegie Institution of Washington

The Carnegie Institution for Science is dedicated to scientific discovery and supporting exceptional individuals in an atmosphere of independence.

• Education N.E.C.

• 97.

Las Cumbres Observatory Global Telescope Network Inc

Las Cumbres Observatory is a private operating foundation, building a global network of telescopes for scientific research and citizen science projects.

• Professional Societies & Associations

• 98.

Warren Astronomical Society

Owned and operated by the Warren Astronomical Society.

• University or Technological

• 99.

YERKES FUTURE FOUNDATION INC

The Birthplace of Modern Astrophysics | World's Largest Refractor Telescope | Henry Ives Cobb - Architect | Frederick Law Olmsted Firm - Landscape The Birthplace of Modern Astrophysics Astronomy.