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Astronomy Picture of the Day: The Cave Nebula in Hydrogen, Oxygen, and Sulfur

What's inside this cosmic cave? A stellar nursery 10 light-years deep.

Astronomy Picture of the Day: NGC 1499: The California Nebula

There's even a California in space. Drifting through the Orion Arm of the spiral Milky Way Galaxy, this cosmic cloud by chance echoes the outline of California on the west coast of the United States.

Astronomy Picture of the Day: Cygnus Shell Supernova Remnant W63

The ghost of a long-dead star, the W63 supernova remnant shines like a faint cosmic smoke-ring along the plane of the Milky Way galaxy toward the northern constellation Cygnus the swan.

Astronomy Picture of the Day: Barnard 150: Seahorse in Cepheus

Light-years across, this suggestive shape known as the Seahorse Nebula appears in silhouette against a rich, luminous background of stars.

Astronomy Picture of the Day: Hyperion: Largest Known Galaxy Proto-Supercluster

How did galaxies form in the early universe?

Astronomy Picture of the Day: Summer to Winter Milky Way

Taken near local midnight, this autumn night's panorama follows the arch of the Milky Way across the northern horizon from the High Fens, Eifel Nature Park at the border of Belgium and Germany.

Astronomy Picture of the Day: M15: Dense Globular Star Cluster

Messier 15 is an immense swarm of over 100,000 stars.

Astronomy Picture of the Day: NGC 1672: Barred Spiral Galaxy from Hubble

Many spiral galaxies have bars across their centers. Even our own Milky Way Galaxy is thought to have a modest central bar.

Astronomy Picture of the Day: NGC 1898: Globular Cluster in the Large Magellanic Cloud

Jewels don't shine this bright -- only stars do. And almost every spot in this glittering jewel-box of an image from the Hubble Space Telescope is a star.

Astronomy Picture of the Day: 55 Nights with Saturn

For 55 consecutive nights Mediterranean skies were at least partly clear this summer, from the 1st of July to the 24th of August 2018.

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