red shift

I need help on understanding what redshift is and what the charts mean

Answers
cronus
01 January 2013
This You Tube video explains the Doppler Effect and Red Shift
cronus
01 January 2013
I heard an interesting take on this recently. Although it might be even harder to accept, the reason the galaxies appear to be receding from us is that space itself is expanding. If one imagines a ray of light (staying with the wave theory for the moment!) then the light ray in the space is being stretched. So the light ray's wavelength is greater than it would have been if the space had been left alone. The idea of expanding space is alluded to in Cronus's video (8 mins in)
ianmoth
02 January 2013
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