Logo Astronomy Day is a world-wide event observed each spring and fall around the time of first-quarter moon. Local astronomical societies, planetariums, museums, and observatories sponsor public viewing sessions, presentations, workshops, and other activities to increase public awareness about astronomy and our universe. Key LinksAstronomical LeagueLatest Astronomy Day InformationAstronomy Day Fact SheetAstronomy Day Co sponsorsFree … Continue reading Astronomy Day