The Sun and its Family
The solar system is located at a distance of about 30,000 to 33,000 light years form the centre of the Milky Way galaxy. The sun is a star like other stars with the only difference that it is nearer to us as compared to other stars. It has a family of its own. The sun and its family put family of its own. The sun and its family put together are called the solar system. The solar system consists of nine planets, their satellites, asteroids, comets, meteoroids and other debris.
Planets are heavy bodies which, like our earth, revolve round the sun. They do not have their own light. They look bright s the sun’s light falls on them and are reflected from their surfaces.
The nine planets are – Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune and Pluto.
Mercury, Venus, Jupiter, and Saturn may be seen from the earth with naked eyes. These were known to the astronomers thousands of years ago. Three planets, namely Uranus, Neptune and Pluto were discovered later after the invention of telescope. Uranus was discovered in 1781, Neptune in 1846 and Pluto in 1930.
In the recent years, astronomers have explored the possibility of existence of a tenth planet. There is a fair chance of discovering more moons, especially around Jupiter and Saturn.