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This Weeks’ Sky at a Glance, October 16 – 24

Mars is edging away a bit now from its close approach to Earth, but on the other hand, it rises higher into fine telescopic view earlier in the night.

Cassiopeia stands high in the northeast these evenings, a flattened W standing on end. The third segment of the W, counting down from the top, points almost straight down. Extend that segment twice as far down as its own length, and you’re at the Double Cluster in Perseus. This pair of star-swarms is dimly apparent to the unaided eye in a dark sky (use averted vision), and it’s visible from almost anywhere with binoculars. It’s lovely in telescopes.

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