Friday, September 25Mercury passes 1.0° north of Spica at 9 P.M. EDT. You can find more details on how to observe them shortly after sunset in last week’s column, as today we’re focusing on another event. Neptune reaches opposition this evening at 10 P.M. EDT, placing the planet at its best for viewing. However, withContinue reading “The Sky This Week from September 25 to October 2: Neptune at opposition”
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