Chester Astronomical Society is one of the world's oldest scientific societies going back to 1892.
It hosts public lectures by amateurs and professionals alike and arranges visits to sites of technical interest.
Thursday, 28 November 2013
Rob Johnson of Liverpool AS gave an enthralling talk yesterday on spectroscopy. He showed us what an amateur could do with relatively cheap equipment to take the spectra of stars and gather informationm from them. It reminded me of my previous studies when I was always amazed at just how much information could be discerned from a simple spectrum. I was also interested to see that he proved that there is oxygen in the earth's atmosphere. I had always wondered...