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. A galaxy is a large group of stars, gas and dust in space. The Sun, Earth and stars that you can see without a telescope, belong to the galaxy called the Milky Way. Stars begin inside a nebula which is a dark cloud of gas and dust. These clumps of dust spin around and get hotter and hotter.