Some of the most puzzling worlds in our telescopes’ catalogs may not be worlds at all, but relics from the first instants after the Big Bang. Instead of rocky or gaseous spheres, a handful of “planets ...

Black holes have long captured the imagination, often portrayed as cosmic monsters devouring everything in their path. But what if one, smaller than a grain of sand, passed through your body? A recent ...

"We don't have the technology now — but in 20 or 30 years, we might." When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Future technology could one ...

Now, in the journal Physical Review Letters, researchers say their ability to analyze gravitational waves has improved so much over the past decade that they were recently able to verify a key idea ...