The Star Analyser

I’m currently experimenting with the Star Analyser diffraction grating, inspired by Jack Marin, who showed me an amazing high-resolution view of the solar spectrum, with hundreds of absorption lines visible, through his LIRES III high-resolution spectroscope when he visited. Visually, at the eye-end of the C-14, the Star Analyser (which is about the cheapest astronomical-quality grating you can get, costing about £70) shows a perceptible difference between a “standard” star, like Vega, and a “strange” one, like Gamma Cassiopeia, with emission lines. However, you do have to know what you are looking for. I know because Jack showed me some photos of stellar spectra taken with a grating, C-11 and Canon EOS 350D camera.

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