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

If ultimately true, the universe will reach its maximum size around 11 billion years from now. At that point, physics (and ...

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 ...

The universe is approaching the midpoint of its 33-billion-year lifespan, a Cornell physicist calculates with new data from ...

“The cosmos is also within us, we're made of star-stuff. We are a way for the cosmos to know itself.” - Carl Sagan Compared to the Sun, how big is the Earth? What is a scale model and how does it help ...

Mathematical quirks of our universe have led some cosmologists to wonder whether the cosmos was actually born in a black hole.

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

"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 propose that gravitational waves shaped the universe. Their model challenges inflation theory. How exactly did the ...

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

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 ...