Nasa may revisit one of outer space’s thorniest questions ...

Astronomers have discovered a brand-new class of exoplanet unlike anything previously known. This discovery, featured in ...

Frigid water helped paint Mars red and may have shaped a vast coastline, two new studies into the planet’s history reveal. Scientists have detected a possible ancient beach in Mars’ northern ...

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 ...

A provocative new study suggests Dante’s Inferno may have secretly doubled as a giant cosmic impact scenario centuries before ...

Forbes contributors publish independent expert analyses and insights. Leslie Katz covers the intersection of culture, science and tech. A yellowish-orange glow bathes Phainoterra, a planet of dramatic ...

Six planets will align before dawn on June 3 in a planetary parade, but only two will be visible to the naked eye. Mercury, Jupiter, Uranus and Neptune will likely be obscured by the rising sun or ...

Unfortunately for science fiction fans, desert worlds outside our solar system are unlikely to host life, according to new research from the University of Washington. Scientists show that an ...

A possible cousin of Pluto seems to be circling the far reaches of the solar system. The dwarf planet candidate 2017 OF201 travels in a superwide orbit, with the sun relatively near one end of its ...