Learn how a possible ninth planet, the theoretical Planet X, could have acquired its wide orbit in the outer Solar System - a ...

Learn about the recently discovered trans-Neptunian object that may eventually join Pluto as a dwarf planet, found at the ...

In the cold, distant reaches of the Solar System, far beyond Pluto, astronomers have just identified what could be a new ...

If there is to be a global apocalypse, what might be to blame for wiping out all life on Earth? Scientists believe they may ...

Hunting for the building blocks of life? Located in the asteroid belt, Ceres is likely a good bet, study finds ...

Here’s 11 ‘facts’ you were probably taught at school which were either never true in the first place or are no longer correct ...

Pluto makes a lap around the sun every 248 Earth-years. The International Astronomical Union’s Minor Planet Center, which catalogs new moons and other small bodies in the solar system ...

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

It's an evocative idea that has long bedeviled scientists: a huge and mysterious planet is lurking in the darkness at the ...

Mar. 17, 2025 — A combination of cosmic processes shapes the formation of one of the most common types of planets outside of our solar system, according to a new ... Webb Telescope Captures Its ...

It’s been nearly three decades since Saturn last set up shop in the sign of the ram — and everyone will be feeling the ...

Scientists estimate it could be around 700 kilometers wide—large enough to be considered a dwarf planet like Pluto ... out to the far edges of the solar system after close encounters with ...