Looking for a sky event this week? Check out our full Sky This Week column. October 15: Double crater Messier Late this evening for much of the U.S., Saturn’s small moon Tethys transits the ringed planet’s disk along with its shadow. It’s the best-timed such event all month for U.S. observers, beginning shortly after midnight EDT (so,Continue reading “The Sky Today on Friday, October 16: Tethys and its shadow transit”
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