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.

What is the biggest object in the universe? Learn more about the biggest objects in the universe, including galaxies, galaxy ...

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

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

There are several candidates for the biggest star in the universe. One of them, VY Canis Majoris, is over 1,500 times the width of the sun. If it were placed in our solar system, it would stretch to ...

“The first thing we know about the universe is that it’s really, really big,” says cosmologist Michael Turner, who has been contemplating this reality for more than four decades now. “And because the ...

The universe may not expand forever as scientists once believed. According to new calculations by Cornell physicist Henry Tye, the cosmos is approaching the midpoint of its 33-billion-year life and ...

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