Astronomy Picture of the Day: Aerosol Earth

For August 23, 2018, the identification and distribution of aerosols in the Earth's atmosphere is shown in this dramatic, planet-wide visualization.

Astronomy Picture of the Day:Close Mars

Still bright in evening skies, Mars was just past opposition and closest to Earth on July 31, a mere 57.6 million kilometers away.

Astronomy Picture of the Day: The NGC 6914 Complex

A study in contrasts, this colorful skyscape features stars, dust, and glowing gas in the vicinity of NGC 6914.

Astronomy Picture of the Day: Nearby Cepheid Variable RS Pup

In the center is one of the most important stars on the sky.

Astronomy Picture of the Day: Sea and Sky Glows over the Oregon Coast

Every step caused the sand to light up blue. That glow was bioluminescence -- a blue radiance that also lights the surf in this surreal scene captured last month at Meyer's Creek Beach in Oregon, USA.

Astronomy Picture of the Day: Total Solar Eclipse Shadow from a Balloon

Where were you during the Great American Eclipse of 2017?

Astronomy Picture of the Day: Fire on Earth

Sometimes, regions of planet Earth light up with fire.

Astronomy Picture of the Day: Stripping ESO 137-001

Spiral galaxy ESO 137-001 hurtles through massive galaxy cluster Abell 3627 some 220 million light years away.

Astronomy Picture of the Day: Messier 20 and 21

The beautiful Trifid Nebula, also known as Messier 20, is easy to find with a small telescope in the nebula rich constellation Sagittarius.

Astronomy Picture of the Day: Comet, Heart and Soul

The greenish coma of comet 21P/Giacobini-Zinner stands out at the left of this telephoto skyscape spanning over 10 degrees toward the northern constellations Cassiopeia and Perseus.

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