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

This hypothesis is not new. It was given the affectionate nickname of Big Crunch, and says that the accelerated expansion of ...

If you think a galaxy is big, compare it to the size of the Universe: it’s just a tiny dot which, together with a huge number of other tiny dots, forms clusters that aggregate into superclusters, ...

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

The universe's expansion means its size is bigger than its age suggests. The universe's expansion doesn't have a speed limit like objects within it. Distant galaxies move away from us as space itself ...

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

When we look for “the biggest” in the universe, it is important to specify our definition of the object of study. Is it something indivisible and with a neat boundary, like a black hole? Or do we ...

"The overarching structure of the universe is the Cosmic Web, which you can imagine as a spider web, or a fishing net, in 3D. The basins of attraction are superimposed on this structure surrounding ...

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