Universe

Everything that exists makes up the Universe, from the smallest particles to the biggest structures, whether on Earth or space. It includes everything that is visible, invisible, everything that is known and more that is unknown. Over time, humans have had different ideas of what the Universe is and how it works, how it started and what its future is. Today, scientists know more than ever before, but there is much still to be learnt.

The common object in the Universe is the star. There are billions and billions of them. At least one of these, the sun, has planets. One of these planets, Earth, has life. On the face of it stars, planets and humans are very different, but they do have things in common. They are all made of the same chemical elements or compounds of them and they are all affected by the laws of science such as gravity and the electromagnetic force. By studying the constituents of the Universe and understanding the laws, scientists can build up a picture of the Universe and discover its past and predict its future.