Oh, would it not be absurd if there was no objective state?
What if the unobserved always waits, insubstantial,
till our eyes give it shape?

— Peter Hammill

APOD

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Astronomy Picture of the Day
Updated: 15 hours 16 min ago

38 Hours in the M81 Group

15 hours 16 min ago

From a garden on planet Earth, 38 hours of exposure


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15 hours 16 min ago

What's at the tip of this interstellar jet?


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15 hours 16 min ago

Sometimes, the Moon visits the Pleiades.


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15 hours 16 min ago

How much mass do flocculent spirals hide?


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15 hours 16 min ago

Why are there so many moonquakes?


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A Gargoyles Eclipse

15 hours 16 min ago

In dramatic silhouette against a cloudy daytime sky over Paris, France,


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The ISS Meets Venus

15 hours 16 min ago

Made with a telescope shaded from bright sunlight by an umbrella,


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Hickson 44 in Leo

Thu, 04/10/2025 - 12:00am

Scanning the skies for galaxies, Canadian astronomer


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The Da Vinci Glow

Thu, 04/10/2025 - 12:00am

The Da Vinci Glow


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Tue, 04/08/2025 - 8:00pm

Why does Jupiter have rings?


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Mon, 04/07/2025 - 4:00pm

Can the Sun appear to rise twice at the same time?


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Sun, 04/06/2025 - 12:00pm

If you watch long enough, a comet will appear.


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Sat, 04/05/2025 - 12:00pm

What if the Sun and Moon rose together?


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Stereo Helene

Fri, 04/04/2025 - 8:00am

Get out your


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Lunar Dust and Duct Tape

Thu, 04/03/2025 - 4:00am

Lunar Dust and Duct Tape


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Messier 81

Wed, 04/02/2025 - 12:00am

One of the brightest galaxies in planet Earth's sky is similar in size


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Wed, 04/02/2025 - 12:00am

You'd think the Pacman Nebula would be eating stars, but actually it is forming them.


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Mon, 03/31/2025 - 8:00pm

What causes a blue band to cross the Moon during a lunar eclipse?


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Sun, 03/30/2025 - 4:00pm

If the full Moon suddenly faded, what would you see?


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Sat, 03/29/2025 - 12:00pm

This was once a beach -- on ancient


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