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Science, engineering, and mathematics — biology, chemistry, physics, astronomy, earth sciences, social sciences, and technology research. A curated gateway to academic and professional scientific resources.
57129 resources
News, pictures, calendar, groups, for sale, archives, observatory information, and links.
Activities, calendar, ads, astrophotography, light pollution project, and links.
Association from Constantine, Algeria, devoted at promoting Astronomy and fostering the Scientific spirit.