The only planet we know of with life ... and lots of it.The only planet we know of inhabited entirely by robots.King of the planets.





Solar system, assemblage consisting of the Sun and those bodies orbiting it: 8 planets with about 170 known planetary satellites; countless asteroids, some with their own satellites; comets … Coauthor of

Our solar system is made up of the sun and all the amazing objects that travel
around it. This site is maintained by the Planetary Science Communications team at Our editors will review what you’ve submitted and determine whether to revise the article.The solar system is situated within the Orion-Cygnus Arm of the Scientists have multiple theories that explain how the solar system formed.



The more-distant one, called the All the planets and dwarf planets, the rocky asteroids, and the icy bodies in the Kuiper belt move around the Sun in

Outward from the Sun, which is represented to scale by the yellow segment at the extreme left, are the four rocky terrestrial planets (Mercury, Venus, Earth, and Mars), the four hydrogen-rich giant planets (Jupiter, Saturn, Uranus, and Neptune), and icy, comparatively tiny Pluto.The orbits of the planets and other bodies of the solar system.Learn about the comparative size of various solar system objects.

Only the Sun has more influence on our solar system.A star, eight planets, hundreds of moons, millions of asteroids and comets and much, much more. Virtually any topic for the virtual learner.







Note: Worlds shown are  A star, eight planets, hundreds of moons, millions of asteroids and comets and much, much more. Director, NASA Planetary Science Division: Dr. Lori Glaze The favoured theory proposes that the solar system formed from a Located at the centre of the solar system and influencing the motion of all the other bodies through its gravitational force is the Sun, which in itself contains more than 99 percent of the mass of the system.

Get 30% your subscription today. Note: Worlds shown are not to scale.

Professor of Astronomy, University of Hawaii at Manoa, Honolulu. Britannica Premium: Serving the evolving needs of knowledge seekers. Articles from Britannica Encyclopedias for elementary and high school students.

The planets, in order of their distance outward from the Sun, are Any natural solar system object other than the Sun, a planet, a dwarf planet, or a moon is called a The solar system’s several billion comets are found mainly in two distinct reservoirs.









The planets (in comparative size) in order of distance from the Sun.The eight planets of the solar system and Pluto, in a montage of images scaled to show the approximate sizes of the bodies relative to one another.

NASA researchers are tracking a slowly splitting 'dent' in Earth’s magnetic field.

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