Absolute magnitude from an absolute magnitude in a specific filter band to absolute bolometric magnitude, a bolometric correction is applied. For Solar System bodies that shine in reflected light, a different definition of absolute magnitude (H) is used, based on a standard reference distance of one astronomical unit. In stellar and galactic astronomy, the standard distance is 10 parsecs (about 32.616 light-years, 308.57 petameters or 308.57 trillion kilometres). A star at 10 parsecs has a parallax of 0.1″ (100 milliarcseconds). Galaxies (and other extended objects) are much larger than 10 parsecs, their light is radiated over an extended patch of sky, and
2 or 3 Things I Know About Him 2 or 3 Things I Know About Him 2 or 3 Things I Know About Him () is a documentary film in which German director Malte Ludin examines the impact of Nazism in his family. Malte's father, Hanns Ludin, was the Third Reich's ambassador to Slovakia. As such, he signed deportation orders that sent thousands of Jews to Auschwitz. Hanns Ludin was executed for war crimes in 1947. Malte Ludin did not undertake this film until after the death of his mother, Erla. The documentary does include clips of earlier interviews he conducted with Erla, however. Malte also interviews his