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10 hours ago · Nanjing [b] is the capital of Jiangsu province in eastern China. The city has 11 districts, an administrative area of 6,600 km 2 (2,500 sq mi), and a population of 9,423,400 as of 2021. [6] Situated in the Yangtze River Delta region, Nanjing has a prominent place in Chinese history and culture, having served as the capital of various Chinese ...
1 day ago · Stellar classification. 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.
