In astronomy, luminosity is the amount of energy a body radiates in unit time.
Stellar luminosities are usually expressed in solar luminosities, sometimes the absolute bolometric magnitude is given instead, what is related to the luminosity.
In X-ray and radiowavelengths, luminosity is sometimes expressed in watts.
... Königsberg[?], where he remained till his death. In his last years he was quite blind.
Throughout his long professorial career, and in all his numerous publications he ...