IAU Commissions

• Commission 4: Ephemerides
• Commission 5: Documentation and Astronomical Data
• Commission 6: Astronomical Telegrams
• Commission 7: Celestial Mechanics and Dynamical Astronomy
• Commission 8: Astrometry
• Commission 9: Instrumentation and Techniques
• Commission 10: Solar Activity
• Commission 12: Solar Radiation and Structure
• Commission 14: Atomic and Molecular Data    (US mirror site)
• Commission 15: Physical Study of Comets and Minor Planets
• Commission 16: Physical Study of Planets and Satellites
• Commission 19: Rotation of the Earth
• Commission 20: Position and Motions of Minor Planets, Comets and Satellites
• Commission 21: Light of the Night Sky
• Commission 22: Meteors, Meteorites and Interplanetary Dust
• Commission 25: Stellar Photometry and Polarimetry
• Commission 26: Double and Multiple Stars
• Commission 27: Variable Stars
• Commission 28: Galaxies
• Commission 29: Stellar Spectra
• Commission 30: Radial Velocities
• Commission 31: Time
• Commission 33: Structure and Dynamics of the Galactic System
• Commission 34: Interstellar Matter
• Commission 35: Stellar Constitution
• Commission 36: Theory of Stellar Atmospheres
• Commission 37: Star Clusters and Associations
• Commission 40: Radio Astronomy
• Commission 41: History of Astronomy
• Commission 42: Close Binary Stars
• Commission 44: Space and High Energy Astrophysics
• Commission 45: Stellar Classification
• Commission 46: Astronomy Education and Development
• Commission 47: Cosmology
• Commission 49: Interplanetary Plasma and Heliosphere
• Commission 50: Protection of Existing and Potential Observatory Sites
• Commission 51: Bioastronomy: Search for Extraterrestrial Life