The white light we see is made up of the different colours of the spectrum. When we see a rainbow, we see the light split up into the different colours.
A spectrometer is a tool used by astronomers to split the light collected by a telescope into its colour spectrum. This allows astronomers see the details in the light and see the spectrum of a star.
Different chemical elements in stars absorb the certain colours of light which results in these black lines on the spectrum. This tells us which elements are present in the star.
Follow the instructions to make your own star spectrum.
You will need: A large selection of materials in the colours of the rainbow, at least 8 of each colour (eg, small toys, lego, pencils, scraps of paper, crayons, stones, beads, buttons, ribbons, wool, stationary, fabric, clothes, pipe cleaners, lolly sticks, pom poms or other collage materials)
At least 4 black lines (e.g. strips of black paper or card, shoe laces, black socks or fabric, black pencils or pens)