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A Meteor and the Gegenschein
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Animation: Spiral Disk around a Black Hole
What would it look like to orbit a black hole?
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Extremely wide field
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Astronomy Picture of the Day: Extraordinary Solar Halos
Welcome to the December Solstice, the first day of winter in planet Earth's northern hemisphere and summer in the south.
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Astronomy Picture of the Day: Airglow Borealis
The best known asterism in northern skies hangs over the Canadian Rockies in this mountain and night skyscape taken last week from Banff National Park.
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Astronomy Picture of the Day: Halo of the Cat's Eye
Not a Falcon 9 rocket launch after sunset, the Cat's Eye Nebula (NGC 6543) is one of the best known planetary nebulae in the sky.
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Astronomy Picture of the Day: Cosmic Collision Forges Galactic Ring
How could a galaxy become shaped like a ring?
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Astronomy Picture of the Day: From the Galactic Plane through Antares
Behold one of the most photogenic regions of the night sky, captured impressively.
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Astronomy Picture of the Day: Coronal Rain on the Sun
Does it rain on the Sun? Yes, although what falls is not water but extremely hot plasma.
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Astronomy Picture of the Day: Milky Way vs Airglow Australis
Captured last week after sunset on a Chilean autumn night, an exceptional airglow floods this allsky view from Las Campanas Observatory.
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