SOLAR SYSTEM

Detailed explanation-1: -The earth has conditions that support life. It is neither too hot nor too cold. It has both water and air, which are both indispensable for life. The presence of oxygen in the air in appropriate proportion supports life.

Detailed explanation-2: -But in the early period of our solar system’s formation, that disk was much hotter at the position where our Earth sits now. So even though there were most likely water molecules present in the mess of debris that made up the disk, it was too hot for water to condense into a liquid, causing it to evaporate instead.

Detailed explanation-3: -Earth is the only planet known to support life.

Detailed explanation-4: -Yet Earth remains a standout, and so far, one of a kind. Of the thousands of exoplanets – planets around other stars – confirmed by our increasingly powerful telescopes, and despite extensive probing of the solar system, ours is still the only planet known to host life.

Detailed explanation-5: -Currently, the most favored explanation for where the Earth got its water is that it acquired it from water-rich objects (planetesimals) that made up a few percent of its building blocks. These water-rich planetesimals would have been either comets or asteroids.