Planet and Exoplanets:- A planet is orbiting a star. It is very massive. These are made up of rock, common minerals and metals like Aluminium, Magnesium and etc. The gravitational power cause to orbiting its own orbit.
The terrestrial planets are mostly contained heavier gases and gaseous compounds. Such as carbon dioxide, oxygen, nitrogen, ozone.
Earth:- Earth has an atmosphere, that is suitable for living things. In the earth’s atmosphere is spread by oxygen gas is a favored quantity. It is really liable to the life in the Earth. But the other gases are also needed for life to live.The quantity of these gases are imbalanced, it causes pollution, global warming, ozone depletion and a number of problems.
Exoplanets:- Exoplanets is simply defined as the planets that beyond our solar system. The search for Earth-like planets can prove that the other planets are also situated in the Universe. These planets are also called extrasolar planets. The first scientific detection of an exoplanet was in 1988.
But the first confirmed detection was in 1992. These are mostly discovered by HARPS and Kepler space telescope. Now we are facing a starting stage of this technology. It is not easy to detect these planets.
These planets just appear in the sky like small dark spots. These telescopes are very powerful. But even the stars also appear bright spots in the sky, then we watch through the telescopes. At present we try to detect the stars through it. This helps to realize it.