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The Pelican Nebula in Gas, Dust, and Stars
The Pelican Nebula is slowly being transformed.
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Equinox: The Sun from Solstice to Solstice
Today is an equinox, a date when day and night are equal.
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Moonquakes Surprisingly Common
Why are there so many moonquakes?
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The Longer Days
This persistent six month long exposure compresses the time from solstice to solstice (December 21, 2018 to June 16, 2019) into a single point of view.
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Astronomy Picture of the Day: A Rainbow Geminid Meteor
Meteors can be colorful. While the human eye usually cannot discern many colors, cameras often can.
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Astronomy Picture of the Day: Moon behind Lava Fountain
What's happened to the Moon? Nothing, but something has happened to the image of the Moon.
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Astronomy Picture of the Day: The Clash of NGC 3256
Marked by an unusually bright central region, swirling dust lanes, and far flung tidal tails, peculiar NGC 3256 is the aftermath of a truly cosmic collision.
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Astronomy Picture of the Day: Kepler's House in Linz
Four hundred years ago today (May 15, 1618) Johannes Kepler discovered the simple mathematical rule governing the orbits of the solar system's planets, now recognized as Kepler's Third Law of planetary motion.
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Astronomy Picture of the Day: Moon in the Hyades
Have you seen the Moon lately? On April 18, its waxing sunlit crescent moved through planet Earth's night across a background of stars in the Hyades.
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Tips and Techniques for Photographing the Northern Lights
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