Spectroscopy websites

• ww.astrosurf.com/buil
• http://www.astrosurf.com/vdesnoux/
• http://astrospectroscopy.de/
• http://www.threehillsobservatory.co.uk/astro/astro.htm
• Vereinigung der Sternfreunde Fachgruppe   Spektroskopie
• ARAS Spectroscopy forum
  

Photometry websites

• Underoak Observatory
  

Solar websites
 the Solar Explorer

705nm Solar imaging

• http://brierleyhillsolar.blogspot.com/
  

Greek amateurs

Geomagnetism tutorial

freeware

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BASS