The outer solar system once seemed like a quiet backwater. But a glut of tiny, strange moons with unruly orbits are coming ...

As it turns out, the conditions that set Venus and Jupiter up for their conjunctions in the sky are the same that are ...

This week's science news.

(Ianm35/iStock/Getty Images Plus) The Solar System is one of the comforting constants of human existence. No matter what else ...

Explore the relative sizes of the planets in our Solar System and discover their actual distances from the Sun in this ...

Far beyond Neptune, strange patterns in the Kuiper Belt suggest something massive may be hiding in the darkness. This video ...

Venus, Jupiter and Mercury are due to form a planet parade in June visible across the US. What to know, including the date ...

Scientists studying a rare, ancient angrite meteorite found in the Sahara Desert have uncovered evidence of a lost ...

The solar system’s history is steeped in mystery, with suggestions of ancient chaos possibly casting out enormous planets.

A rare meteorite found in the Sahara Desert is pointing to the existence of a large rocky world that once orbited the Sun, ...

A new study suggests that a massive structure beyond Jupiter trapped the cosmic dust needed to form the first building blocks ...

Mercury is due to join Venus and Jupiter in the night sky for an uncommon celestial event commonly known as a planet parade.