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September 2026

The world's best-selling astronomy magazine offers you the most exciting, visually stunning, and timely coverage of the heavens above. Each monthly issue includes expert science reporting, vivid color photography, complete sky coverage, spot-on observing tips, informative telescope reviews, and much more! All this in an easy-to-understand, user-friendly style that's perfect for astronomers at any level.
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An artist's illustration of 'Oumuamua, the first known interstellar object detected passing through the solar system, depicted as a long, thin, reddish-brown elongated rock tumbling through space near a bright glowing sun. A diffuse dust or gas trail streams behind it, and the starry black background of deep space surrounds the scene.
Exoplanets

Why aren’t free-floating planets captured when they fly past stars?

A composite photograph showing a lunar analemma — a sequence of Moon images captured at the same time over multiple nights — tracing a graceful figure-eight shaped arc across the night sky above the illuminated skyline of Giza, Egypt, with the three Great Pyramids silhouetted against the city's orange glow. The Moon's phases progress and change in size throughout the sequence, reflecting its varying distance and illumination over the course of the observation period.
Solar System, The Moon

Why doesn’t the moonrise time change by the same amount of time each day?

A pale blue Neptune centered against a dark gray background, showing faint darker banding and a bright wispy cloud feature near its equator.
Observing

September 2026: What’s in the sky this month? Neptune reaches opposition with Saturn nearby, and Venus shines after sunset

Bright Venus and the star Spica shine close together in a twilight sky over the Salish Sea, above a colorful orange-to-blue sunset gradient, with silhouetted rocky shoreline, a house, and distant mountains reflected in the calm water below.
Observing

September 2026: What’s in the Southern Hemisphere sky this month?

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