Our solar system consists of nine planets.Mars,the red planet is under research.Our scientists have found that there is a change in the nature of the atmosphere.It is considered that Mars had a better atmosphere than it has today.Different gases and isotopes occupied the planet's atmosphere.Thus the nature of the atmosphere got changed.Heavier isotopes are found in Mars and their ratio is very high when compared to our Earth.The ratio of Deuterium is about 5 times higher than that of Earth.
This ratio differs from place to place and for different seasons the ratio is different.The presence of carbon and oxygen in the carbon dioxide in terms of their isotopes are measured and analysed.Today the red planet has a thin atmosphere.The planet lost its thick atmosphere due to the changes that happened in it.