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Hace 8 horas · Botswana (English: Land of the Tswana; / b ɒ t ˈ s w ɑː n ə / ⓘ, also UK: / b ʊ t-, b ʊ ˈ tʃ w-/), officially the Republic of Botswana (Setswana: Lefatshe la Botswana, [lɪˈfatsʰɪ la bʊˈtswana]), is a landlocked country in Southern Africa.Botswana is topographically flat, with approximately 70 percent of its territory being the Kalahari Desert. ...
Hace 8 horas · In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element ...
