01
Astronomical refracting telescopes
Two converging lenses in normal adjustment
Coming soon
02
Reflecting telescopes
The Cassegrain arrangement and aberration
Coming soon
03
Radio, infrared, ultraviolet and X-ray telescopes
Compared with optical telescopes
Coming soon
04
Advantages of large diameter telescopes
Rayleigh criterion, collecting power and the CCD
Coming soon
05
Classification by luminosity
Apparent magnitude and the Hipparcos scale
Coming soon
06
Absolute magnitude
The parsec, the light year and the distance relation
Coming soon
07
Classification by temperature
Black-body radiation, Stefan's law and Wien's law
Coming soon
08
Stellar spectral classes
O to M, their colours and absorption lines
Coming soon
09
The Hertzsprung-Russell diagram
Main sequence, giants, dwarfs and stellar evolution
Coming soon
10
Supernovae, neutron stars and black holes
Standard candles and the Schwarzschild radius
Coming soon
11
The Doppler effect in astronomy
Red shift applied to optical and radio frequencies
Coming soon
12
Hubble's law
Expansion of the universe and the Big Bang
Coming soon
13
Quasars
The most distant measurable objects
Coming soon
14
Detection of exoplanets
Radial velocity and transit methods
Coming soonAll of this is free
Taught sessions are currently GCSE maths only. Join the waiting list and it helps me decide what to open next.