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New study suggests violent origin for Mars’ moons
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.
April 19, 2018
TESS planet hunter on its way
"It’s the beginning of a new era of exoplanet research."
April 19, 2018
Exoplanets: Worlds orbiting distant stars
Humans have been speculating about their existence for thousands of years, but ours is the 1st generation to know, with certainty, that exoplanets are really out there.
April 19, 2018
See it! Moon sweeps past Venus
Wonderful photos from the EarthSky community of the moon's sweep this week past the brightest planet, Venus.
April 18, 2018
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. :-)
April 18, 2018
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.
April 17, 2018
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
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
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
