Enjoy this interesting and unique photo of star trails, showing the whereabouts of the celestial equator and the arc of stars around both celestial poles.
It was thought Mars' 2 small moons - Phobos and Deimos - might be captured asteroids. But new work suggests a violent birth for the moons during a colossal impact.
How do we know earlier industrial civilizations on Earth didn't rise and fall long before humans appeared? That's the question posed in a new scientific thought experiment.
For weeks, people have searched for this post more than any other at EarthSky. No, there won't be a green moon on April 20, 2018. It's a joke, y'all, with its roots (ahem) in cannabis culture. :-)
Our sun's sibling stars could be scattered across the sky. Astronomers are sifting through newly released data in the GALAH Survey - a galactic archaeology survey - hoping to find them.
Scientists 1st observed gravitational waves from merging black holes. Now they're targeting a different gravitational wave signal: a long continuous waveform from a rapidly spinning neutron star.
A popular hike in Big Bend National Park in Texas will take you to what's called "the Window.” It's a grand place to watch the sun or moon set. Here's a night shot, complete with zodiacal light.
This composite - centered on celestial south - is made of images taken hourly from outside the dome of the Anglo-Australian Telescope at Siding Spring Observatory.
Deborah Byrd (asteroid 3505 Byrd) helps edit EarthSky.org and is a frequent host of EarthSky videos. Deborah created the EarthSky radio series in 1991 and founded EarthSky.org in 1994. Prior to that, she had worked for the University of Texas McDonald Observatory since 1976, and created and produced their Star Date radio series. She has won a galaxy of awards from the broadcasting and science communities, including having an asteroid named in her honor in 1990, a Public Service Award from the National Science Board in 2003, and the Education Prize from the American Astronomical Society in 2020. A science communicator and educator since 1976, Byrd believes in science as a force for good in the world and a vital tool for the 21st century. "Being an EarthSky editor is like hosting a big global party for cool nature-lovers," she says.