Astronomers think that a dwarf planet hiding in the middle of our solar system could be a source of frozen water. The dwarf ...

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 Solar System doesn't get much colder than the Kuiper Belt. Out past the orbit of Pluto, far from the warmth of the Sun, drifts a vast expanse of icy rocks and dwarf planets thought too cold to ...

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.

This solar system consists of four inner rocky planets and four outer gas giant planets as well as an asteroid belt, containing thousands of huge rocks, dwarf planets and comets. Our solar system ...

The solar system may hold ... indicate an unseen massive planet. The Kuiper Belt is a distant region of icy bodies. It extends beyond Neptune and includes Pluto and dwarf planets.

The dwarf planet ... reached the inner Solar System only later. For the current study, the researchers looked for previously unknown deposits of organic material on dwarf planet Ceres.

"This range includes planetary masses to brown dwarf masses," Malhotra said. Because many simulations had the planet-like object swooping through the inner solar system, the researchers created an ...