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

The enormous visitor to our solar system may have been about 8 times the mass of Jupiter, and come nearly as close to the sun ...

By the time the star becomes a white dwarf, any planet that was habitable ... as well as through gravitational interactions between planets. Our own solar system, for example, had a migration ...

A planetary system anchored by a dead white dwarf star ... times that of Jupiter, the solar system's most massive planet. This object is likely to be a "brown dwarf," a body often referred ...

The building blocks of life could have been delivered to solar system dwarf planet Ceres by one or more space rocks from the outer asteroid belt. NASA OSIRIS-REx asteroid sample return team has ...

The organic material found in a few areas on the surface of dwarf planet Ceres is probably of exogenic origin. Impacting ...

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

The organic material found in a few areas on the surface of dwarf planet Ceres is probably of exogenic origin. Impacting ...

Opinions expressed by Forbes Contributors are their own. Jamie Carter is an award-winning reporter who covers the night sky. Computer simulations suggest that there is an undiscovered Earth-like ...

In a study published in AGU Advances, researchers from the Max Planck Institute for Solar System Research (MPS) used data ...

But the question remains as to whether a planet could retain a water-rich environment through the red giant stage of a star before it becomes a white dwarf ... Our own solar system, for example ...