Study on the Origin of the Earth’s Water

Planet Earth holds a comparatively abundant of liquid water. The only astronomical object which sustains liquid water on its surface is the solar system. This study will commence with introducing the use of analysing the isotropic and chemical composition when considering the potential source of water on Earth. The analysis of these compositions allows a level of constraint when considering the ultimate question of the origin of water on Earth. Subsequently, the study will review two different candidates potentially responsible for the source of the water on earth: comets and carbonaceous chondrites with their key supporting evidence. The review continues with a discussion of the present challenges, mainly focused on the controversies between the two scenarios based on their water delivery scenario. Due to the insufficient data on the comets in the solar system, and the existing uncertainty on the research of the Earth’s interior, both scenarios are possible to bring water to the Earth if further corrections of their model can be done in the future. Furthermore, the study will discuss the future initiatives of the next generation researching directions.