Cosmology is the study of the Universe. It doesn't look at small objects, like stars or planets. It investigates the Universe on a large scale.

Cosmologists use science to work out how the Universe started and how it changed over time. They also think about what will happen to it in the future.

To learn more about the Universe (including the Big Bang!) explore the sections below.

Big Bang

Credit: NASA / WMAP


Credit: NASA/ESA