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.

Rachel Feltman
at 10:22 AM Mar 1 2017

Most galaxies in the universe have at least one thing in common: supermassive black holes tend to sit in their centers, silently gorging on interstellar gas and dust and obliterating anything that comes within range of their event horizon. But scientists know very little about the origin of these behemoths or how they got to be so supermassive.

Sarah Fecht
at 10:17 AM Feb 9 2017

Europe's Gaia spacecraft has spotted a 'bridge of stars' between two dwarf galaxies. The bridge—a halo of faint light arching between two of the Milky Way's nearest neighbors—is 43,000 light-years long.

Sarah Fecht
at 11:19 AM Nov 2 2016

Between 2009 and 2013, the Kepler space telescope stared at a single patch of the sky, searching for exoplanets. Around the star KIC 8462852, it appears to have spotted something much stranger.

 
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