luminosity
131Apparent magnitude — Asteroid 65 Cybele and 2 stars with their magnitudes labeled The apparent magnitude (m) of a celestial body is a measure of its brightness as seen by an observer on Earth, normalized to the value it would have in the absence of the atmosphere.… …
132Arthur Stanley Eddington — Infobox Scientist name = Arthur Eddington image width = 247px caption = Arthur Stanley Eddington birth date = birth date|1882|12|28|df=y death date = death date and age|1944|11|22|1882|12|28|df=y birth place = Kendal, England death place =… …
