ESO is the European Organisation forAstronomical Research in the Southern Hemisphere. It operates the La SillaParanal Observatory in Chile and has its headquarters in Garching, nearMunich, Germany.

Easy astrophysics: Star Spectroscopes for Astronomy Teachers and Amateur Astronomers.
URL: http://www.starspectroscope.com/

The Southeast Ohio Astronomical Society, operating from Athens County Ohio, promotes the study of astronomy and astrophysics for the general public. This is generally accomplished in collaboration with the Ohio University Astro
URL: http://www.athensastronomy.org/

Buffalo Astronomical Association
URL: http://www.buffaloastronomy.com/

cba, center for backyard astrophysics
URL: http://cba.phys.columbia.edu/

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