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Planet Earth at Blue Hour

Nature photographers and other fans of planet Earth always look forward to the blue hour.

Astronomy Picture of the Day: Good Morning Leonid

On November 17, just an hour before sunrise, this bright and colorful meteor flashed through clear predawn skies.

Astronomy Picture of the Day: The Old Moon in the Young Moon's Arms

Tonight the Moon is young again, but this stunning image of a young Moon near the western horizon was taken just after sunset on October 10.

Astronomy Picture of the Day: The Falcon 9 Nebula

Not the Hubble Space Telescope's latest view of a distant planetary nebula, this illuminated cloud of gas and dust dazzled even casual U.S. west coast skygazers on October 7.

Astronomy Picture of the Day: The Last Days of Venus as the Evening Star

That's not a young crescent Moon poised above the hills along the western horizon at sunset.

Astronomy Picture of the Day: Real Time Perseid

Bright meteors and dark night skies made this year's Perseid meteor shower a great time for a weekend campout.

Astronomy Picture of the Day: Red Planet, Red Moon, and Mars

Mars is also known as The Red Planet, often seen with a reddish tinge in dark night skies.

Astronomy Picture of the Day: Shadow Rise on the Inside Passage

At sunset look east not west. As Earth's dark shadow rises from the eastern horizon, faint and subtle colors will appear opposite the setting Sun.

Astronomy Picture of the Day: Northern Lights and Noctilucent Clouds

Skies after the near-solstice sunset on June 17 are reflected in this calm lake.

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