CERN

CERN is the world's largest particle physics laboratory. It is home to the largest particle accelerator, an underground circular device with a diameter of two kilometers.

Particles

Particles are what particle physicists study. A molecule is a particle of a compound, an atom a particle of an element. Electrons, protons and neutrons make up atoms, and quarks make up the components of an atom. Virtual particles carry forces, such as gravity and atomic forces.

The Universe

The universe is what physicists study on both the very large and the very small scales. The concept of the size of the universe has improved over the past few centuries. It is much larger than previously envisioned. The complexity of its structure is also better understood, but not completely.

The Solar System

The solar system is home to earth. It consists of planets that orbit the sun according to the...