Scientists believe that two asteroids might be fragments of long-lost "planetary embryos" from the early solar system.

The solar system is portrayed as a dynamic, gossip-fueled family, with each planet offering snide comments about one another, ...

All seven of the other planets in our solar system are about to become visible at once in a great planetary alignment – ...

Take advantage of a special 6-7 planet alignment from Earth's perspective. Planets 'line up' in the skies over California in ...

The four-planet lineup that began in January concludes by mid- to late February, as Saturn sinks increasingly lower in the ...

To better understand why the planets have variable compositions ... to the formation of the gas and ice giants in the outer solar system. This first-order model of planetary growth in the solar ...

Each planet in the solar system is characterized as different cricket team players, with unique behaviors and skills. Earth ...

Does our Solar System have 9 planets or only 8? Astronomers have gone back and forth on that a lot, with Pluto now being classified as a dwarf planet. However, out beyond Neptune there could be ...

Predictions are uncertain, but the solar system may be pushed farther from the galactic core or even ejected entirely from ...

These embryos, somewhere between small planetesimals and fully formed planets, were abundant during the solar system's formative stages and played a critical role in planetary formation.

An object eight times the mass of Jupiter may have swooped around the sun, coming superclose to Mars' present-day orbit before shoving four of the solar system's planets onto a different course.

Mars, Venus, Jupiter and Saturn should be visible to the naked eye, but with a telescope you can spot Neptune and Uranus.