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The Big Corona

Most photographs don't adequately portray the magnificence of the Sun's corona.

The Interstellar Clouds of Orion

The constellation of Orion is much more than three stars in a row.

Stephan's Quintet from Hubble

When did these big galaxies first begin to dance?

NICER at Night

Neutron star Interior Composition Explorer (NICER)

A part of barnard loop and Messier 78


Astronomy Picture of the Day: Across Corona Australis

Cosmic dust clouds are draped across a rich field of stars in this broad telescopic panorama near the northern boundary of Corona Australis, the Southern Crown.

Astronomy Picture of the Day: Swirls and Colors on Jupiter from Juno

What creates the colors in Jupiter's clouds? No one is sure. The thick atmosphere of Jupiter is mostly hydrogen and helium, elements which are colorless at the low temperatures of the Jovian cloud tops.

Astronomy Picture of the Day: Comet 46P/Wirtanen

Periodic Comet 46P/Wirtanen is now the brightest comet in the night sky, but too faint to be seen by eye.

Astronomy Picture of the Day: Mars in the Loop

This composite of images spaced some 5 to 9 days apart, from late April (bottom right) through November 5 (top left), traces the retrograde motion of ruddy-colored Mars through planet Earth's night sky.

Astronomy Picture of the Day: Jupiter in Ultraviolet from Hubble

Jupiter looks a bit different in ultraviolet light.

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