The word planet is derived from the word “ planets “ which means wanderer this name is given to them as they appear to wander in the night sky from east to west while stars also move from east to west but they seem to remain fixed relative to each other and the planet relative to them seem to move forward and backwards.
A planet is a celestial body that revolves around the sun in fixed orbits and planets do not have the light of their own but reflects the light of the sun they also do not twinkle like other stars as they are too close to us and till now the earth is the only known planet to harbour life and have the favourable condition.
Understanding the Planets
According to the widely accepted Big Bang theory, our Universe started with an explosion of a concentrated mass in space. Later it the constellation of stars and planet systems emerged.
Our solar system is one of such many planetary systems. It consists of 8 planets in the order of Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. Pluto was discarded from the list in August 2006 by the International Astronomical Union (IAU). It is now recognised as a dwarf planet.
The Sun present at the centre of the Solar system is the hinge point and source of energy for all planets. The first four inner planets are termed terrestrial planets as they are constructed of solid mass and have hard surfaces. They are also known as telluric planets or Rocky planets. The four exterior planets are giant balls of gasses and are termed as Jovian planets.
Mankind has had knowledge about planets since ancient ages but after the invention of telescopes, scientists discovered the presence of the lesser-known Uranus, Neptune, and Pluto.
Earth is the most distinct planet of all because of the life system it sustains. Being located at a very appropriate distance from the sun which maintains a convenient environment that is neither too hot nor too cold makes it possible.
By the recent developments in more powerful telescopes and assisted by space exploration we have come to know about the presence of similar kinds of planets in other systems and constellations. With the unending effort of our Scientists and Astronomers, we may be surprised by the revelation of many mysteries that our Universe holds.