According to the equations that govern black holes, the larger one of these cosmic behemoths is the lower its average density ...

The known universe is full of shockingly huge things. Here are the largest planets, stars, galaxies, and structures we've observed in the universe so far.

We know how the universe began. An event we call the Big Bang started it all about 13.8 billion years ago. How the universe ...

"For the last 20 years, people believed that the cosmological constant is positive, and the universe will expand forever," Tye says. "The new data seem to indicate that the cosmological constant is ...

Parallels in the physics of the universe and that of black holes have led some cosmologists to wonder if our universe could have been born in a black hole. Photograph by NASA Goddard Gazing up at the ...

We’ve grown up with the idea that the universe will expand forever, meaning the "cosmological constant" is positive. What if it's negative?

"We're really pushing the boundaries of what current technology can detect." A team of astronomers says it has identified the most distant black hole ever confirmed — a cosmic heavyweight that formed ...

Scientists are rethinking the universe’s deepest mysteries using numerical relativity, complex computer simulations of Einstein’s equations in extreme conditions. This method could help explore what ...

Astronomers have long thought the universe should look generally the same in every direction, but an anomaly in the radiation ...

For science-fiction enthusiasts, that’s a bit depressing. Space is big, and while the speed of light is incredibly fast to us ...