One of the most obvious careers linked to space and astronomy is studying the stars.
This involves observing the Universe and interpreting physical processes.
People who follow this path are called astronomers or astrophysicists. Astrophysics means using physics to study space.
It is different from many other sciences. Scientists cannot carry out experiments in space. They cannot change conditions or repeat tests. Instead, astrophysics is an observational science.
Astronomers study space using telescopes. These telescopes provide snapshots of distant objects. By comparing many such observations, astronomers investigate past and future behaviour.
This approach works because space contains billions of galaxies, each containing billions of stars, many with planets in orbit.
Astronomy relies heavily on maths and statistics. These tools help scientists test and support ideas.
Today, astronomers do not always look through telescopes. They also use powerful computers. Scientists write computer programmes that follow the laws of physics. These programmes create models of the Universe. The models can run forwards and backwards in time.
In astrophysics, scientists combine observations with computer simulations. Using both together makes theories more reliable.
For many years, light was the main signal studied in astronomy, until the detection of gravitational waves expanded what could be observed.
One direct route into astrophysics is studying the subject at university.
This usually means focusing on maths and physics at school. However, there are many paths into astronomy. Some people come from computing. Others come from maths, engineering, or chemistry.
Another way to explore space science is through star-gazing.