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Editors of EarthSky
Astronomers find largest-yet galaxy proto-supercluster
Astronomers have identified a gigantic proto-supercluster of galaxies forming in the early universe, just 2.3 billion years after the Big Bang.
November 9, 2018
Galaxy-scale fountain seen in full glory
At the core of the giant elliptical galaxy Abell 2597, a supermassive black hole is powering the cosmic equivalent of a gargantuan, ongoing fountain.
November 9, 2018
Lucy mission to Jupiter’s Trojans gets the nod from NASA
There are perhaps as many Trojan asteroids orbiting 60 degrees ahead of and behind Jupiter as in the asteroid belt between Jupiter and Mars. Now NASA has given a go-ahead for the 1st mission to Jupiter's Trojans.
November 5, 2018
5 weird ocean phenomena
Strange things happen in the ocean as a result of weather and currents. These 5 events are just a few of them.
November 2, 2018
Cassiopeia to Andromeda galaxy
One half of the W of Cassiopeia is more deeply notched than the other half. This deeper V is your "arrow" in the sky, pointing to the Andromeda galaxy.
November 2, 2018
Ancient cold front in Perseus
Galactic cold fronts aren't like the cold fronts we experience on Earth. They're caused by galaxy clusters colliding into one another.
October 30, 2018
NOAA issues 2018-19 Winter Weather Outlook for US
About 3/4 of the United States is more likely to be warmer-than-average than colder-than-average this winter, according the NOAA report, and western drought is likely to persist or worsen.
October 28, 2018
Top 5 things to know about InSight Mars
InSight is a Mars lander - not a rover - designed to study a whole world from just one spot. It's due to arrive at Mars in November. Here are 5 highlights of the mission.
October 27, 2018
Baby stars blow bubbles in Cat’s Paw nebula
In the star-forming Cat's Paw nebula, baby stars heat up the gas surrounding them. The gas then expands to form bubbles in the nebula.
October 25, 2018
This planetary nebula has 2 ultra-close stars at its heart
A planetary nebula isn't related to planets. It's an old star, sloughing off its outer layers. Now astronomers have spied 2 ultra-close stars at a planetary nebula's heart. The pair orbits in only 3 hours!
October 24, 2018
