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

O ur solar system, a cosmic ballet of planets held together by gravity and inertia, is uniquely structured compared to many other systems we observe in the universe. A notable difference is the ...

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

Solar masses are a unit of measurement used in astronomy to express the mass of other celestial objects in comparison to the ...

“Our Solar System’s Kuiper Belt long appeared to be very small in comparison with many other ... but much like our broadening view of the universe, some new facts are certainly coming into ...

The Sun is our nearest star. It is a relatively small star when compared to other stars in the universe. Our Solar System contains the Sun and everything that orbits it. The life cycle of a star ...

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 ... the same plane. Compared with Mercury ...

MyDream Universe is a sandbox space simulation game. Start from a small asteroid absorbing other asteroids to form a solar system. Roaming sandbox universe and discover wandering planets or solars ...