This Week’s Sky at a Glance, December 15 – 23

This Week’s Sky at a Glance, December 15 – 23

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As the Summer Triangle sinks in the west, Altair is the first of its stars to go. Start by spotting bright Vega in the northwest at nightfall. The brightest star above it is Deneb. Altair is farther to Vega's lower left.

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