Astronomy Picture of the Day: Moon, Mars, and Milky Way

Just two weeks ago, dark skies over the desert in northern Iran held this alluring celestial vista.

Astronomy Picture of the Day: Spiral Galaxy NGC 6744

Beautiful spiral galaxy NGC 6744 is nearly 175,000 light-years across, larger than our own Milky Way.

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: Neutrino Associated with Distant Blazar Jet

With equipment frozen deep into ice beneath Earth's South Pole, humanity appears to have discovered a neutrino from far across the universe.

Astronomy Picture of the Day: Rings Around the Ring Nebula

There is much more to the familiar Ring Nebula (M57), however, than can be seen through a small telescope.

Astronomy Picture of the Day: A Nibble on the Sun

The smallest of the three partial solar eclipses during 2018 was just yesterday, Friday, July 13.

Astronomy Picture of the Day: Star Trails and the Bracewell Radio Sundial

Sundials use the location of a shadow to measure the Earth's rotation and indicate the time of day.

Astronomy Picture of the Day: Centaurus A

Only 11 million light-years away, Centaurus A is the closest active galaxy to planet Earth.

Astronomy Picture of the Day: Symbiotic R Aquarii

You can see it change in brightness with just binoculars over the course of a year.

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