We meet some keen astronomers and find out what inspires them to use telescopes to gaze into the night sky. An astronomer is a person who studies stars, the Sun, Moon, planets and other objects in space. A star is a large ball of glowing gases. The Sun is the closest star to the Earth. Many stars are bigger than the Sun.
Stars have different colours, depending on how hot they are.
Each star lives for billions of years. A group of stars that makes a pattern in the sky are called a constellation. People can see different constellations depending on where they are in the world. People use a telescope to study the stars and their constellations. The Southern Cross is the smallest constellation, but it has some of the brightest stars in the sky.