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

The universe is full of wonders, but some worlds are downright deadly. From searing heat to violent storms, these planets make Earth look like a paradise. Many of them challenge everything we know ...

Every planet in our solar system is essentially round. But out in the universe, are there any planets that aren't spherical? Technically, planets are round, by definition; they need to have enough ...

NASA has plans to return astronauts to the lunar surface in the near future. Next year, four astronauts will orbit the moon. "We don't need to go back to the moon just for the moon. We're going back ...

The rate of finding these distant worlds has recently increased, with astronomers scrambling to accommodate the data ...

A distant flicker of light from a star can reveal more than you might expect. In fact, a brief, subtle brightening in the sky has helped scientists uncover something astonishing: planets much like ...

For centuries our solar system was the only planetary system known to humans. We had no proof other worlds existed beyond those in our own cosmic backyard, and we imagined that if other planetary ...