Astronomy is the study of everything in the universe beyond Earth's atmosphere. That includes objects we can see with our naked eyes, like the Sun , the Moon , the planets, and the stars . It also includes objects we can only see with telescopes or other instruments, like faraway galaxies and tiny particles.

Statistical physics is a branch of physics that uses probability theory and statistics to solve physical problems that usually involve systems composed of a large number of units. Its main purpose is to study the properties of a system from the statistical behaviour of its components.