• Science: Astronomy: Stars: Variable Stars  (10)

• The Amateur Sky Survey - TASS - Project objective to construct low-cost, drift-scan cameras and distribute to sites around the world to monitor for bright objects across a large section of sky.
• Center for Backyard Astrophysics - A global network of small telescopes dedicated to photometry of cataclysmic variables.
• Coddenham Astronomical Observatory - Dedicated to the search for and research of Supernovae.
• Extrasolar Planet Search Project - Dedicated to amateur radial velocity studies.
• Hellenic Supernova Search Team - Features a description of supernovae, members, observatory information, sponsors, other projects, gallery, and news.
• MBCAA Observatory - Observations of variable stars and transient phenomena.
• The Puckett Observatory - Study of comets and the discovery of supernovae.
• Systemic - A collaberative effort with public participation to build a statistical model of the galactic planetary census.
• Transitsearch - Coordinates a cooperative observational effort to allow experienced amateur astronomers and small college observatories to discover transiting extrasolar planets.

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