Science 10 with CSS teacher

The stars you see in the night sky are actually huge balls of gas, held together by gravity. Stars generate energy in the form of light, which is why you see them glow in the sky. Stars can be many different sizes, colours and temperatures. At the centre of our solar system, our Sun is an average-sized yellow star.

Star clusters are groups of stars that formed at the same time and in the same place. Star clusters remain together for a long time because they are held together by gravity.

When you look at the stars in the night sky, you may be able to see patterns and shapes. Ancient observers also saw patterns and gave them names. We call these patters of stars constellations.