Friday, August 10, 2012

A journey through our Solar system
Part 1 - Know our solar system

So friends many of you already know much about our Solar system, but for those who don't know much we will explain you.

The Solar System is located in the Milky Way galaxy, a barred spiral galaxy with a diameter of about 100,000 light-years containing about 200 billion stars. The Sun resides in one of the Milky Way's outer spiral arms, known as the Orion–Cygnus Arm or Local Spur. The Sun lies between 25,000 and 28,000 light years from the Galactic Center, and its speed within the galaxy is about 220 kilometres per second, so that it completes one revolution every 225–250 million years. This revolution is known as the Solar System's galactic year. 
The Solar System consists of the Sun and other astronomical objects gravitationally bound in orbit around it. The principle object in our solar system is the sun and countaining 99.89 % mass of the solar system.our sun is G2 main-sequence star{we will explain it later}. the 99% of the remaining masss is dominated by for lasgest planets als called gas giants. and leave rest of the mass for inner planets and other objects.
The four smaller inner planets, Mercury, Venus, Earth and Mars, also called the terrestrial planets, are primarily composed of rock and metal then comes the outer planets, also called the gas giants, are substantially more massive than the terrestrials. Jupiter, Saturn, Uranus and Neptune, The Solar System is also home to a number of regions populated by smaller objects. The asteroid belt, which lies between Mars and Jupiter, is similar to the terrestrial planets as it is composed mainly of rock and metal. Beyond Neptune's orbit lie the Kuiper belt and scattered disc.

in next we will explain the formation of our solar system. hope you'll like it.