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.

Astronomy Picture of the Day: Noctilucent Clouds over Paris Fireworks

It's northern noctilucent cloud season -- perhaps a time to celebrate!

Astronomy Picture of the Day: Road to Mars

What's that light at the end of the road? Mars.

Astronomy Picture of the Day: The Extraordinary Spiral in LL Pegasi

What created the strange spiral structure on the upper left?

Astronomy Picture of the Day: A Northern Summer's Night

Near a summer's midnight a mist haunts the river bank in this dreamlike skyscape taken on July 3rd from northern Denmark.

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