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P8 - Space, Lyfe cycle of a star - Coggle Diagram
P8 - Space
Red shift
As a star moves away from an observer (the Earth) there will be low frequency light waves (Red)
DIstant galaxies have larger red shift and are moving away from the Earth at a greater speed.
Doppler effect The change in frequency in frequency of a wave as its source moves in relation to an observer
Red light from distant galaxies shows how their wavelength has increases and therefore shows they are moving away and quickly. This gives proof that the galaxies are expanding
Orbits - Curved path taken by a moving boding around another larger body due to mutual gravitational attraction
Heliocentric - The sun is in the centre of our solar system
Speed is constant
The direction changes
The velocity changes because because the direction changes : its a vector quantity
CMBR
Radiation left over from the big bang
At the start of the universe, there wre gamma waves with a high energy, high frequency and short wavelength. Now as the universe has expanded there are now microwaves with a low energy, low frequency and a long wavelength
Formations of elements
Elements up to iron (lighter elements) are formed due to fusion in a main sequence star
Heavier elements are formed in a supernova explosion of high mass stars. These elements are then flung around into the universe
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