The french magazine “L’Astronomie” #91

A french magazine publishes a long series of article on planetary nebulae and one in particular on the use of our spectrograph(s) to confirm the nature of newly discovered nebulaes…

How amateur astronomers contribute to research by discovering new planetary nebulae. An 8-page article shows how astronomers confirm the nature of these nebulae thanks to spectroscopy … and Shelyak Instruments spectrographs ! (LISA and Alpy models)

A “collector”