Giant Galaxy Cluster "El Gordo" Is Even Bigger Than We Thought

We already knew that this ancient galaxy cluster (nicknamed "El Gordo") was the largest of the distant galaxies that we had spotted, but it turns out we've been massively underestimating its size. How did astronomers figure it out? Simple. They weighed it. » 4/03/14 6:00pm 4/03/14 6:00pm

Our First Glimpse of the Web that Connects All Galaxies

Astronomers say all of the galaxies in the universe are connected by a vast cosmic web of filaments, but we've never actually seen this supposed network. That's changed, however, thanks to the tumultuous activity of a distant quasar that's illuminating the celestial backdrop. » 1/21/14 9:00am 1/21/14 9:00am

The Objects in Space That We Really, Really Can't Explain

Forget UFOs — there are a lot of objects and events in space that are identified, but still completely incomprehensible. From planets in our solar system, to inexplicable energy bursts from across the universe, here are some of the enduring mysteries of the space and time we call home. » 1/02/14 1:40pm 1/02/14 1:40pm

Watch the most accurate supercomputer simulation yet of the universe

Using some of the most powerful supercomputers on the planet, the fine folks at Argonne National Lab have constructed a virtual model of the universe that tracks 1.1 trillion particles as they expand and bind. The achievement is four times larger than previous simulations. » 11/12/13 7:20am 11/12/13 7:20am

"Dark Matter Experiment Has Detected Nothing, Researchers Say Proudly" sounds like something you'd see at the top of an Onion article. But it's not. It's from The New York Times's coverage of the Large Underground Xenon dark matter experiment (a.k.a. "LUX"). Which, unless you're familiar with null signals, reads like the… » 10/31/13 7:30am 10/31/13 7:30am

An incredible image of the biggest galaxy cluster we've ever seen

Hubble telescope has just produced this brain-expanding image of Galaxy Cluster Abell 1689, a dense thicket of galaxies and globular clusters 2.25 billion light years away. It's also a region of the universe that's rich in dark matter. » 9/12/13 2:16pm 9/12/13 2:16pm

How often does dark matter collide with the human body?

Dark matter, say physicists, is everywhere. They say this because the gravitational forces that we observe in the known Universe are greater than the mass of visible matter would lead us to believe is possible. Dark matter, scientists speculate, is the source of the missing mass; in fact, by some estimates, dark matter … » 4/11/12 10:34am 4/11/12 10:34am

Alternative dark matter particle could explain the universe's lithium…

After hydrogen and helium, lithium is the lightest and simplest element in the universe. It should have been everywhere right after the Big Bang...but the data shows a mysterious shortage. The explanation may point to an unlikely dark matter candidate. » 2/23/12 11:19am 2/23/12 11:19am