- sun spot umbras
- • ядро на слънчево петно
English-Bulgarian polytechnical dictionary . 2013.
sun spot umbras
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sun — sunlike, adj. /sun/, n., v., sunned, sunning. n. 1. (often cap.) the star that is the central body of the solar system, around which the planets revolve and from which they receive light and heat: its mean distance from the earth is about 93… … Universalium
