He discovered Oxygen as gaseous element.

This study involve primarily the atmosphere, weather events, and variables that affect weather conditions such as pressure and temperature.

He explained the cause of eclipses correctly; the one who observed the roundness of the earth's shadow on the moon.

Cosmology is the study of the celestial objects such as stars, galaxies, planets, moons, asteroids, comets, and nebulae.

Which galaxy does our Solar System belong to?

This field of study is comprised of various studies in interconnected layers found in the surface of the Earth.

Studies the behaviour, physical properties, and dynamic processes of celestial objects and phenomena (such as in stars).

The study of the universe as a whole.

What percent of the Earth is water?