Our solar system may have a ninth planet after all, following the declassification of Pluto nearly two decades ago, ...

There have been questions about a mysterious ninth planet in our solar system for nearly a decade. Pluto was unseated as ...

open image in gallery Is there a possible ninth planet in our solar system ... first time in over 150 years, there is solid evidence that the solar system's planetary census is incomplete." ...

Astronomers claim to have discovered a new ninth planet in our Solar System ... first time in over 150 years, there is solid evidence that the solar system's planetary census is incomplete." ...

An alternate explanation that fits the evidence is that Vesta was once part of a planet – but which planet that might been ...

Warmer climates than Earth’s could accelerate life’s development, potentially increasing the number of planets with more ...

For years, astronomers have been searching for a ninth planet in our solar system (after giving Pluto the old heave-ho and demoting it to a dwarf planet) and now researchers say they’ve found a ...

Vesta had been thought to have been the last protoplanet, a leftover remnant from the early days of our solar system that never quite made it as a fully fledged planet for some reason. As the ...

For nearly a decade, scientists have been on the hunt for Planet Nine – a hypothetical celestial object on the edge of our Solar System. Now, astronomers claim to have discovered this ninth ...