A new dwarf planet, discovered beyond Neptune and described as Pluto's 'cousin,' could void the hypothesis of a Planet X in ...

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 ...

Some experts remain unconvinced about this discovery. It’s been almost two decades since our solar system lost its 9th planet. Pluto was officially reclassified from a planet to a dwarf planet ...

Pluto was reclassified as a dwarf planet in 2006. Our solar system may have a ninth planet after all, researchers say. The possibility that an additional planet may be hidden far into the solar ...

Explore the hypothetical existence of parallel planetary systems. Trump issues stark warning to Putin amid escalation in Ukraine war Colorful creatures found in Alabama river turn out to be ...

But that includes exoplanets, alien worlds that orbit alien suns. Only eight planets call our solar system home. Or there might still be nine if some astronomers are correct about an as-yet ...

All of our solar system’s planets are lining up to parade through the night sky at once. This extraordinary celestial event will see the sky scattered with seven visible planets in what is known ...

It's an interesting thought experiment; while Borisov and 'Oumuamua were smaller objects, a more massive rogue planet joining our solar system could generate orbital chaos. It could potentially ...

But you might be surprised to know that the search for a new planets in our own solar system is ongoing. In fact, researchers have spent decades combing the night sky for evidence of other planets at ...

"The planets are in perfect synchronous orbit with each other ... We're looking at what a solar system may have looked like billions of years ago, even what our solar system may have looked like ...