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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: Fresh Tiger Stripes on Saturn's Enceladus

Do underground oceans vent through the tiger stripes on Saturn's moon Enceladus?

Astronomy Picture of the Day: Sigma Octantis and Friends

South pole star Sigma Octantis (of the constellation Octans) is on the left of this starry expanse spanning over 40 degrees across far southern skies.

Astronomy Picture of the Day: Red Cloudbow over Delaware

What kind of rainbow is this? In this case, no rain was involved -- what is pictured is actually a red cloudbow.

Astronomy Picture of the Day: Complex Jupiter

How complex is Jupiter? NASA's Juno mission to Jupiter is finding the Jovian giant to be more complicated than expected.

Astronomy Picture of the Day: Saturn's Hyperion in Natural Color

What lies at the bottom of Hyperion's strange craters?

Astronomy Picture of the Day: Stickney Crater

Stickney Crater, the largest crater on the martian moon Phobos, is named for Chloe Angeline Stickney Hall, mathematician and wife of astronomer Asaph Hall.

Astronomy Picture of the Day: The Complete Galactic Plane: Up and Down

Is it possible to capture the entire plane of our galaxy in a single image?

Astronomy Picture of the Day: Dueling Bands in the Night

What are these two bands in the sky?

Astronomy Picture of the Day: In the Heart of the Heart Nebula

What's that inside the Heart Nebula?

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