Over millions of years, these objects grew larger, sweeping up material in their orbits and becoming the planets we know today. This model of solar system formation is known as the nebular hypothesis.

TRI-CITIES, Wash., - A new educational project is set to transform the trails along the Columbia River into a scale model of ...

Billions of years ago, in the frozen edges of the solar system, a violent impact shaped one of space’s oddest pairs. Instead ...

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

When a star is born, it doesn’t emerge in isolation. Instead, it forms inside a large, chaotic cloud of gas and dust. Around ...

Webb Telescope Captures Its First Direct Images of Carbon Dioxide Outside Solar System Mar ... a compelling new model for the formation of super-Earths and mini-Neptunes -- planets that are ...

NASA scientists have sought to understand planet Jupiter, the gas giant whose mass is more than the rest of the planets in ...

Vesta, thought to be the second-largest asteroid in the solar system, could be a piece of an ancient, unknown planet, a new study hints.