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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.