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
Cape San Blas Light enclosing a stair cylinder, with the lantern above ground and above water. The 800,000 candela 3-foot 2-order electric light flashes white every 20 seconds and is visible 16 miles (26 km or 30 km). A radiobeacon was established at the station in 1939. As of June 2012, the light has been added to the lighthouse Doomsday List. In July 2014, the lighthouse and two keepers' quarters were moved from Cape San Blas to George Core Park in Port St. Joe. Cape San Blas Light The Cape San Blas Light is a lighthouse in the state of Florida in the United