- A B-type main-sequence star (B V) is a main-sequence (hydrogen-burning) star of spectral type B and luminosity class V. These stars have from 2 to 16 times the mass of the Sun and surface temperatures between 10,000 and 30,000 K. B-type stars are extremely luminous and blue. Their spectra have strong neutral helium absorption lines, which are most prominent at the B2 subclass, and moderately strong hydrogen lines. Examples include Regulus, Algol A and Acrux.
- Volgograd Oblast (Wikipedia)
Volgograd Oblast (Russian: Волгогра́дская о́бласть, romanized: Volgogradskaya oblastʹ) is a federal subject (an oblast) of Russia, located in the lower Volga region of Southern Russia. Its administrative center is Volgograd. The population of the oblast was 2,500,781 in the 2021 Census.