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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.
April 17, 2018
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.
April 17, 2018
Moon and Venus on April 17 to 19
On April 17 to 19, you'll see some gorgeous pairings of the moon and brightest planet Venus. You'll find them in the west shortly after the sun goes down.
April 17, 2018
Asteroid buzzed Earth this weekend
2018 GE3 swept by at half the moon's distance Sunday, just hours after being detected. Its size is 3 to 6 times that of the space rock that penetrated the skies over Chelyabinsk, Russia, in 2013.
April 16, 2018
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.
April 16, 2018
Will you see the young moon?
It's a wonderful evening for young moon hunting from North America or a Pacific island. The moon will be west after sunset, below brilliant Venus.
April 16, 2018
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.
April 15, 2018
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."
April 15, 2018
Watch launch of TESS planet-hunting mission April 16
TESS will launch on a SpaceX Falcon 9 rocket from Cape Canaveral Air Force Station in Florida. Lift-off is planned for no earlier than 6:32 p.m. EDT (10:32 p.m. UTC).
April 15, 2018
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.
April 15, 2018
