Find the word definition


CalSky (sky calendar) is web based astronomical calculator used by astronomers to plan observing. It was created by Arnold Barmettler a researcher at the University of Zurich and formerly a scientific assistant at the European Space Agency. The website, available in English and German, features a calendar (and/or email notifications) generated for your location including information on aurora, comets, tides, solar and lunar eclipses, planets, bright satellite passes ( ISS, HST, etc.), occultations, transits, satellite flares, and decaying satellites that may be visible.