Mary Beth Griggs
at 13:17 PM Sep 1 2017

In the hours before dawn on March 11, 1437, the constellation Scorpio rose over the horizon near Seoul, Korea. Astronomers tasked with scanning the sky and noting nightly changes—aurorae, comets, shooting stars and the like—noticed something odd about the group of stars they called the tail of the dragon, one of the lunar mansions of the night sky.

Mary Beth Griggs
at 13:17 PM Sep 1 2017

Long ago, 15 bright radio pulses emerged from a dwarf galaxy about 3 billion light years away from Earth. Last Saturday, a telescope in a remote area of West Virginia picked up those signals from a distant corner of the universe, and yesterday, a group of astronomers and astrophysicists shared preliminary results on their observations.

Mary Beth Griggs
at 10:00 AM Jun 6 2017

About 650 light years away, a planet hotter than many stars is hurtling around its sun, leaving a glowing trail of gas in its wake like some sort of superheated comet.

Sarah Fecht
at 10:42 AM May 22 2017

In late 2015, astronomers noticed something absurd happening around a distant star. Something massive seemed to be blocking as much as 20 percent of the star's light.

Neil deGrasse Tyson
at 12:13 PM May 4 2017

So dark matter is our frenemy. We have no clue what it is. It's kind of annoying. But we desperately need it in our calculations to arrive at an accurate description of the universe. Scientists are generally uncomfortable whenever we must base our calculations on concepts we don't understand, but we'll do it if we have to. And dark matter is not our first rodeo.

Sarah Fecht
at 11:54 AM Apr 24 2017

Although the night sky often seems so peaceful and still, a closer look reveals constant movement and change. The Intermediate Palomar Transient Factory (iPTF) in California looks for ephemeral phenomena in the heavens, like stars that fluctuate in brightness, or planets passing in front of their stars.

Rachel Feltman
at 10:00 AM Mar 15 2017

Harry and Sally. Tristan and Isolde. Chip and Dale. Iconic duos, each of them. But they ain't got nothing on X9.

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