Astronomy is a natural science that studies celestial objects and phenomena. It uses mathematics, physics
Hydrology is the scientific study of the movement, distribution, and management of water on Earth and other planets, including the water cycle, water resources, and environmental watershed sustainability.
Objects of interest include planets, moons, stars, nebulae, galaxies, and comets.
Meteorology is a branch of the atmospheric sciences which includes atmospheric chemistry and atmospheric physics
The study of meteorology dates back millennia, though significant progress in meteorology did not occur until the 18th century.
Geology is an Earth science concerned with the solid Earth, the rocks of which it is composed, and the processes by which they change over time.