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6 hours ago · Sirius is a binary star consisting of a main-sequence star of spectral type A0 or A1, termed Sirius A, and a faint white dwarf companion of spectral type DA2, termed Sirius B. The distance between the two varies between 8.2 and 31.5 astronomical units as they orbit every 50 years.
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.
6 hours ago · Fallout: A Post Nuclear Role Playing Game is a 1997 role-playing video game developed and published by Interplay Productions, set in a mid-22nd century post-apocalyptic and retro-futuristic world, decades after a nuclear war between the United States and China. Fallout 's protagonist, the Vault Dweller, inhabits an underground nuclear shelter.
