Posts by 

Deborah Byrd

Was another civilization on Earth before humans?

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.

Green moon on April 20, 2018? Nah

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. :-)

The search for the sun’s lost siblings

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 seeking continuous gravitational waves

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.

Window, zodiacal light, setting moon

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.

Milky Way spins across the sky

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.

Impossibly starry skies over NYC

This week is International Dark Sky Week. Celebrate by watching this impossible, but magical, video of dark, starry skies over light-polluted New York City. It's new from Project Skyglow.

Theorists describe black hole megamergers

"Binary black holes are basically like giant targets hanging out in a globular star cluster, and as you throw other black holes or stars at them, they undergo these crazy chaotic encounters."

Milky Way over the saguaros

A symbol of American West, set against a symbol of the vast universe, caught last week in Saguaro National Park.

Flyover of Jupiter’s north pole in infrared

See what scientists saw this week at a meeting in Vienna. It's a 3-D fly-around of Jupiter's north pole, showing its central cyclone and the 8 smaller cyclones encircling it.

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