The solar system is an assemblage of eight (formerly nine) planets, many planetary satellites or moons, asteroids, and comets. It also contains a vast reaches of highly tenuous gas and dust known as the interplanetary medium. The Sun shoots out a stream of particles called the solar wind. This flows outward through the solar system…
The Sun is only one of billions of stars in our galaxy, the Milky Way. This means there are many other solar systems out in space, each with their own planets and moons. The eight planets in the Solar System and their hundreds of natural satellites (moons) are surrounded by countless asteroids, comets and other…
The solar system is made up of the Sun, planets, moons and countless other small objects such as dwarf planets, comets and asteroids. Our solar system was formed about 4.7 billion years ago when a cloud of gas and dust gathered into a clump that was pulled together by gravity. Over millions of years, this…
The solar system space contains the Sun and a vast array of orbiting objects including planets, moons, asteroids, comets, meteoroids, and interplanetary dust. These are bound to the Sun by gravity, which pulls them together in a circle around the star. The process begins with an enormous cloud of gas and dust called a solar…
