With water being so important to life on Earth, scientists often look for it on exoplanets. But some of those worlds might ...

The bold question-askers at What If consider the implications if Planet X were real. Florida property tax to be eliminated ...

A newly discovered warp in the outer Solar System may have been created by a small, rocky world, much closer to the Sun than ...

A low-density, puffy planet orbiting relatively far from a young star in a nearly perpendicular orbit. What's going on?

Mike Brown is convinced that beyond Neptune, at the far reaches of our solar system, there's an unseen giant planet. "This is the 5th largest planet in our solar system, lurking out there, waiting to ...

Planets that orbit white dwarf stars should be too hot to host alien life, theories suggest. But a new study accounting for ...

Skywatchers who spotted the Jupiter-Venus conjunction on Aug. 12 are in for a dazzling display in the night sky through the end of August, with a "planet parade" building in the eastern sky, with ...

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