The science of stellar spectroscopy was pioneered by Joseph von Fraunhofer and Angelo Secchi. By evaluating the spectra of stars like Sirius into the Sunlight, they observed variations during the power and range of their absorption lines—the dark traces in stellar spectra because of the atmosphere's absorption of distinct frequencies. https://garrettjkjhm.dailyblogzz.com/38316697/top-guidelines-of-hotels-in-bangkok