The science of stellar spectroscopy was pioneered by Joseph von Fraunhofer and Angelo Secchi. By comparing the spectra of stars for example Sirius to the Sunshine, they found variances in the power and range of their absorption strains—the darkish traces in stellar spectra caused by the atmosphere's absorption of specific https://reverautomotivecompany98416.blogspothub.com/36701686/the-2-minute-rule-for-star