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Transcript
1 The Spirit of Enquiry - Sun Fun Where does the Sun get its energy from to shine for hundreds of millions of years? To answer this we need to know what is inside the Sun! 2 What is the Sun made of? How can I find out how the Sun gets its energy to shine? 3 View from a distance. SOHO Satellite observes the Sun Perhaps look at the light that it emits. 4 Sunlight Contains a Message! We can tell a lot from star light using: Land based telescopes Or Telescopes in space 5 Continuous Spectra of Very Hot Objects White Light Hot Bulb Continuous Colours – No gaps in the colours! 6 Emission Spectra of a Gas Coloured Light Hot Gas Only a few colours are emitted by gas. 7 Absorption Spectra of a Gas Hot Bulb Gas The gas absorbs some of the colours 8 The Different Types of Spectra Hot Object Prism Gas Cloud Prism Continuous Spectra Absorption Prism Emission Spectra Spectra 9 Hidden Messages – Elementary Spectra Emission Line Hydrogen Absorption Line 10 Ghost Hunters – The Search for the Sun’s Spectra This is our Sun’s Spectra 1. The intensity(brightness) of the the colours tells us the temperature of the surface of the Sun. 2. The absorption lines tells us what gases are in the Sun. 3. The Sun is mainly made of Hydrogen and Helium gas. 4. However, the Sun also contains a lot of other elements. 11 What is the Universe made from? It turns out that most of the Universe is made from Hydrogen as well! 12 Hydrogen - Star “fuel” The most abundant element in the universe is Hydrogen. Hydrogen was created at the start of the Universe. Hydrogen is used to power the stars.