The orbits of our planets and their moons indicate that planets might be missing from our solar system. According to more than a hundred computer simulations, two additional planets once ...

The search for life beyond Earth has marked a new discovery — evidence of an atmosphere on an Earth-like planet beyond our ...

At the right point of the orbit and stellar cycle, the star’s chromosphere brightens.

Scientists discover the first confirmed atmosphere in habitable zone outside our solar system on LHS 1140b ...

Scientists from Queen's University Belfast have led an international team in the discovery of a rare new planet, which is ...

Add Yahoo as a preferred source to see more of our stories on Google. An illustration showing Planet Nine, a hypothetical, undiscovered planet in our solar system. New research now suggests the ...

It’s the first potentially habitable world known to host an atmosphere, making it a lead contender in the search for life ...

A Jupiter-size exoplanet orbiting a dead star baffled astronomers. But the planet named WD 1856 b could preview the fate of our own solar system when the sun dies.

While life on Mars (and Venus) has long been an obsession for those wondering if we're alone, there are other places in our ...

Scientists may have discovered a dwarf planet far beyond Neptune — an unearthing that may disprove a longstanding theory about the possibility of a giant ninth planet. The dwarf planet's existence ...