One of the most significant topics in science today is the exploration of the vast and endless solar system. The most recent and highly anticipated topic is the discovery of a new planet whose atmosphere mimics one like Earth’s. This is important because it is one of the many threats that could come about in the near or distant future. As the population continues to rise, Earth could one day hit its population limit and cause common peril. Improvements in medicine and industrial farming are causing a decrease in mortality rate and an increase in life expectancy. As population numbers grow, there will be an increase in degradation of the environment causing harmful side effects like increase carbon dioxide levels which could be linked to global warming. Another possibility is the destructive behavior we humans display every day. As the population increases so do the many hurtful activities like pollution, which taints water supplies, air purity, and soil quality. So, it is obvious why many companies and astronomers are determined to find more planets for humans to inhabit. A suitable atmosphere is critical to find the perfect planet. The primary atmosphere of terrestrial planets was once made of the gasses secreted during initial formation, “that is 94.2% Hydrogen, 5.7% Helium and everything else less than 0.1%” (Schombert). However, this primary atmosphere was lost on terrestrial planets due to multiple factors such as the surface temperature, atoms masses, and each planet’s escape velocity. The lighter atoms on the planets were able to move fast enough to reach escape velocity and leak out into space. The warmer terrestrial worlds do not contain hydrogen and helium in their secondary atmospheres. The elements that do remain are often contained in rocky minerals or packed ice. The terrestrial planets that we have in our solar system up to date include Mercury, Venus, Earth, and Mars.