Sky & Telescope is the essential guide to Astronomy. It provides a compendium of statistics about the science and interest of astronomy. Sky & Telescope was founded by Charles A Federer and his wife Helen Spence Federer and began publication at Harvard College Observatory in November 1941, as the result of the merger of the separate magazines, The Sky and The Telescope. In 2005, Sky Publishing Corporation was acquired by New Track Media, a portfolio company of the private equity firm Boston Ventures. In 2014, New Track was sold to F+W Media. The magazine played an important role in the dissemination of knowledge about telescope making, through the column "Gleanings for ATMs" that ran from 1933 to 1990.