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 ...

We currently know of more than 5,800 planets beyond the solar system, but we've only found the tiniest fraction of the exoplanets that astronomers think lie elsewhere in the universe.

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 ...

But it’s not just looks. Rocky composition, general size, orbital behaviors—a lot of those qualities can be the same on both ...

For every Solar System like ours, there may be thousands of planets without stars to orbit.

HIGH above us in the distant reaches of space lie planets of every shape, size and colour. But just how many are in the universe, and what is the nearest planet to Earth?

For every planet that orbits a star like our own, there are likely thousands of 'orphan planets' wandering the galaxy alone.

TESS, the Transiting Exoplanet Survey Satellite, will scan the universe to find exoplanets and whether there is life on any of those planets.

There may be many Earth-like planets scattered around the universe, a study has suggested, raising the possibility that other habitable worlds are out there—and that life may have evolved on it.