FIRSTLY - print this, read this, remember this, take time with this :
then - for what it's worth - here are some bits and pieces
lens formula
practice questions and worked examples
telescope magnification diagram
cassegrain arrangement
resolving power
infra-red astronomy
ultra-violet astronomy
X-ray astronomy
Stars
35 minutes long, but brilliant -
O B A F G K M
one boy and five girls kissed me
Cosmology
Doppler effect
http://m.youtube.com/watch?v=djz_rtnxsfy
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