• Sunset Icon SUNSET:
  • Full Moon Icon MOON: 90% Waxing Gibbous
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Where to Look Tonight


This Week's Sky at a Glance, September 10 – 18

This Week's Sky at a Glance, September 10 – 18

The evening Moon steps eastward over Scorpius as it waxes through first quarter. All four giant planets await your telescope in early to late evening.

where to look

Summer Triangle Overhead

Sky Tour Podcast

The calendar might say “September,” but now is the perfect time to explore the Summer Triangle. Find your way with this month’s Sky Tour podcast.

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What are the Phases of the Moon?

What are the Phases of the Moon?

The phases of the Moon are determined by the relative positions of the Moon, Earth, and Sun.

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The cover of the October 2021 issue

This Month’s Issue

Sky & Telescope Magazine

Explore the astronomy magazine that’s been out of this world for over 75 years.

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The cover of the October 2021 issue

Issue Highlights

  • Venus: Inevitability or Catastrophe?

    Paul Byrne

  • The Case of the Dead Dinosaurs

    Shannon Hall

  • Meet the Neighbors — The Sagittarius Dwarf Spheroidal Family

    Steve Gottlieb