Planetary systems such as our solar system take hundreds of millions of years to evolve. Since humanity has only existed for a sliver of that time, astronomers have only observed planetary systems at birth or,

A group of astronomers has found a solar system 116 light-years from Earth that seems to challenge current theories about how planets are formed. This system

Analysis of an ancient meteorite suggests that rocky planets both near and distant from the sun may have formed at the same time, challenging current models of our solar system’s evolution.

Astronomers have found a distant world that challenges planetary formation theory, with a rocky planet where gas giants should be.

The fourth planet in the system is a rocky world, while the second and third ones are gas planets.

While its star projector leaves a lot to be desired, the Science Can Solar System Planetary Projector is a fantastic educational tool for kids, with its solar system model, complete with talking descriptions of each planet, being the selling point here.

A new Tatooine-like planet outside the solar system may orbit two failed stars, scientists reported Wednesday. Located about 120 light years away, the exoplanet appears to take an unusual path around two brown dwarfs, whipping around at a right angle.