Definition of «luminosity»

Luminosity refers to the total amount of energy emitted by a celestial body, such as a star or planet. It is measured in terms of candela per square meter (cd/m2) and represents how much light is being radiated from that object. The higher an object's luminosity, the more brightly it shines.

Phrases with «luminosity»

Sentences with «luminosity»

Hugely charismatic, humble, and possessed of preternatural luminosity of spirit, Wangari Maathai, the winner of the 2004 Nobel Peace Prize and a single mother of three, recounts her extraordinary life as a political activist, feminist, and environmentalist in Kenya. (bookbrowse.com)
CD - 23 17699 is a orange - red dwarf star of uncertain spectral type K5 to M0 (NStars), but there seems to be agreement that it is a main - sequence dwarf of luminosity type of V. (solstation.com)
Such stars are rich in carbon, and it is believed that the fall in brightness is due to the star's emission of carbon, which then condenses to a dense cloud near the star, rather than to a change in luminosity of the star itself. (britannica.com)
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