The number of planets that orbit the sun depends on what you mean by “planet,” and that’s not so easy to define ...

New findings offer clues about the ancient origins of asteroids and their potential role in the formation of terrestrial ...

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit ...

The formation of our solar system from a singular nebula raises an intriguing question: why did each planet develop with a ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

Earliest inner solar system planetesimals shaped the inventory of moderately volatile elements in terrestrial planets.

The organic ingredients to life, hints to where Earth’s water came from, and the fundamental building blocks of our planet ...

Helium can help scientists detect the speed and direction at which we’re moving through space. Deuterium, which is left over ...

Although the chances of impact are slim, Bennu is still one of the most potentially hazardous known asteroids in our solar ...

Uranus has the craziest tilt in your Solar System. Its tilt is about ninety-eight degrees. That means its north pole is ...

A new climate modeling study presents a new scenario of how climate and life on our planet would change in response to a potential future strike of a medium-sized (~500 m) asteroid.

These embryos, somewhere between small planetesimals and fully formed planets, were abundant during the solar system's formative ... contributed material to the terrestrial planets." ...