Looking for a sky event this week? Check out our full Sky This Week column.  October 3: Dione transits Saturn We’re back at Saturn this evening with the planet as the main attraction as the ringed world reaches opposition today at 8 A.M. EDT. Rising around sunset and setting around sunrise, it is visible all night inContinue reading "The Sky Today on Sunday, October 4: Saturn reaches opposition"

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Looking for a sky event this week? Check out our full Sky This Week column.  October 2: Venus stands still The small moon Dione transits Saturn starting just before midnight EDT. Tenth-magnitude Dione crosses the far northern region of the planet, beginning its journey just minutes after 11:40 P.M. EDT and taking about an hour and aContinue reading "The Sky Today on Saturday, October 3: Dione transits Saturn"

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What type of lighting emits the least amount of light pollution? Peter BladoTacoma, Washington First, use a good lighting fixture, one that is a “full cutoff.” That means there is no direct upgoing light at all. It generally also means there is very little light just below the horizontal, which is the kind of lightContinue reading "How can I reduce my personal contribution to light pollution?"

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Looking for a sky event this week? Check out our full Sky This Week column.  October 1: Perseus’ Double Cluster The brilliant planet Venus stands stationary against the background stars of Virgo at 10 A.M. EDT.  Together with Mercury, Venus is visible for a short time in the western sky after sunset, but you’ll want a clearContinue reading "The Sky Today on Friday, October 2: Venus stands still"

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