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The science of stellar spectroscopy was pioneered by Joseph von Fraunhofer and Angelo Secchi. By evaluating the spectra of stars for example Sirius to your Sunshine, they observed variances within the strength and amount of their absorption lines—the dim traces in stellar spectra brought on by the environment's absorption of https://daltonhgcxs.look4blog.com/75564311/the-basic-principles-of-hotel-job

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