Solar System :

The solar system was formed approximately 4.6 billion years ago by the collapse of a giant molecular cloud. The mass at its centre collected to form the Sun and a flat disk of dust around it. This eventually formed the planets and other bodies of the solar system.

• The solar system consists of the Sun, planets, dwarf planets, moons, and numerous smaller objects such as comets and asteroids.

• 194 moons, 3,583 comets and 796,289 asteroids have been found in the solar system.

• 99.86% of the solar system’s mass is found in the Sun. The majority of the remaining 0.14% is contained within the eight planets.
• The combined mass of all the moons in the solar system is less than 0.1% of the Earth’s mass.
• The four smaller inner planets, also known as the “terrestrial planets”, are primarily composed of rock and metal.
• The four outer planets, also known as the “gas giants”,  are substantially larger and more massive than the inner planets.
• The two innermost gas giants, Jupiter and Saturn, are the largest of the four outer planets and are composed mainly of hydrogen and helium.
• The two outermost gas giants, Uranus and Neptune, are composed largely of ices (water, ammonia and methane).  Together they are referred to as the “ice giants“.
• Other structures of note in the solar system the Asteroid Belt, Kuiper Belt and Oort Cloud.

Solar System Profile :

Stars:	1
Planets:	8
Dwarf Planets:	5
Moons:	194
Asteroids:	796,289
Comets:	3,583
Age:	4.6 billion years