Deep-Sky Planner

{{Infobox Software

| name = Deep-Sky Planner

| developer = Knightware

| released = {{Start date and age|1994|04|01|df=yes}}

| latest_release_version = v9

| latest_release_date = {{Start date and age|2024|06|14|df=yes}}

| operating system = Microsoft Windows

| license = Proprietary software commercial software

| genre = Astronomy software

| website = {{URL|https://knightware.biz/}}

}}

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{{cite web | url=http://cocatalog.loc.gov/cgi-bin/Pwebrecon.cgi?v1=1&ti=1,1&Search_Arg=Deep-Sky%20Planner&Search_Code=TALL&CNT=25&PID=NKsOJGa_wQCFlnaKkFGoDwdzuiYg&SEQ=20140202085821&SID=1 | title=United States Copyright Office | date=April 1, 1994 | access-date=2014-02-01}} April 1, 1994 by Sky Publishing Corporation. Knightware, LLC began publishing Deep-Sky Planner in 2005.{{cite web | url=http://cocatalog.loc.gov/cgi-bin/Pwebrecon.cgi?v1=4&ti=1,4&Search_Arg=Deep-Sky%20Planner&Search_Code=TALL&CNT=25&PID=NKsOJGa_wQCFlnaKkFGoDwdzuiYg&SEQ=20140202085821&SID=1 | title=United States Copyright Office | date=August 5, 2005 | access-date=2014-02-01}} Subsequent versions have been released to present.

Deep-Sky Planner received best astronomy product of the year awards in 2013 from Astronomy magazine{{cite journal |last=Harrington |first=Phil |title=Astronomy's fourth annual Star Products |journal=Astronomy |volume=41 |issue=9 |pages=58–64 |date=September 2013}} and in 2014 from Sky & Telescope magazine.{{cite journal |author= |url=http://media.skyandtelescope.com/documents/HotProducts2014.pdf |title=Hot Products for 2014 |journal=Sky & Telescope |volume=127 |issue=1 |pages=62–69 |date=January 2014 |access-date=2014-02-16 |archive-url=https://web.archive.org/web/20140306163352/http://media.skyandtelescope.com/documents/HotProducts2014.pdf |archive-date=2014-03-06 |url-status=dead }}

The software is developed and distributed by Knightware, LLC.