Deep-Sky Planner is observation planning and logging software for amateur astronomers. It helps observers to determine where and when to view all types of celestial objects. It runs on Windows. Deep-Sky Planner was originally published April 1, 1994 by Sky Publishing Corporation. Knightware, LLC began publishing Deep-Sky Planner in 2005. Subsequent versions have been released to present. Deep-Sky Planner received best astronomy product of the year awards in 2013 from Astronomy magazine and in 2014 from Sky & Telescope magazine.The software is developed and distributed by Knightware, LLC.