• NexStar+ Hand Control - 19 Feb 12
• Hand Control Compatibility - 25 Feb 12
• Hand Control Version 4 for NexStar GPS, CPC, SLT, GT and 'i' Series - 26 Feb 05
• How to Upgrade Hand Control Firmware - 14 Jan 06
• How to Upgrade Motor Control Firmware - 2 Feb 08
• Celestron's Online Spare Parts Store - 4 Sep 10
• Backlash and How to Set Anti-backlash Compensation - 7 Apr 03
• Power Sources for Your NexStar, CGE, CGE Pro, CGEM or AS-GT Scope - 9 Oct 05
• Comparison of NexStar GPS and Meade LX200GPS Scopes - 9 Apr 03
• Questions about RS-232 Control and Upgrades via PC - 5 Jun 02
• Firmware Versions on the NexStar GPS Series
• Common Problems with PC to Scope Communications - 13 Jun 03
• Common Problems with PDA to Scope Communications - 4 Jul 04

• NexStar GPS Altitude Axis Repair - an article by Tom Hayko - 25 Mar 11
• SkyScout Connect - Interfacing Your Scope with Celestron's SkyScout - 30 Nov 08
• Cancel a GoTo in Progress - 18 Jun 07
• StarGPS-NX - GPS Receiver for Celestron Scopes - 4 Mar 07
• Skyan - Basic Wireless Control of Your Telescope and Motorized Focuser - 7 Jul 06
• NexStar Hand Control Version 4 User's Guide - Updated Regularly
• New Upgradeable Hand Control Available from Celestron - 14 Jan 06
• Celestron Utility for Improved PEC Recordings - PECTool - 25 May 05
• SCT Corrector Plate Removal - 15 Apr 05
• Fastar Secondary Turns When Tightening the Retaining Ring - 15 Apr 05
• Replacing the Battery on the GPS Board - 21 Feb 05
• Disassembly of the NexStar GPS Azimuth Axis - this link takes you to Lenny Shaffer's web site - 9 Sep 06
• Disassembly of the NexStar GPS Azimuth Axis - this link takes you to Matthias Bopp's web site, read Adrian Richards' article "Replace or adjust the azimuth clutch of a NexStar GPS telescope" - 14 Dec 04
• Disassembly of the NexStar GPS Altitude Axis - this link takes you to Matthias Bopp's web site, read the article "Replace or adjust the altitude clutch of a NexStar GPS telescope" - 11 Nov 04
• Disassembly of the NexStar GPS Azimuth Axis - this link takes you to Michael Downing's web site - 11 Nov 04
• Some Settings Are Not Reset by Factory Settings Command - 24 Sep 04
• Doug Robertson's Light Pollution Blocker for NexStar GPS Scopes - 22 Sep 04
• Ports and Connectors on NexStar GPS Scopes - 27 July 04
• Cleaning Optics - Part 1 - Glass Surfaces - 22 Mar 04
• Cleaning Optics - Part 2 - Mirrors - 27 Mar 04
• Fastar No Longer Offered on NexStar 11 GPS Scopes - 28 Feb 04
• Updated N11 GPS Motor Control Board from Celestron - Updated 30 Jan 04
• Collimating Schmidt-Cassegrain Telescopes - 15 Jan 04
• Extending the Hand Control Cable - 23 Dec 03
• Get a Full 2" Aperture for Your NexStar 11 - 11 Dec 03
• Pin Connections in Auto Guide Port - 24 Nov 03
• Select Alignment Stars - A Program to Aid in Alignment - 8 Sep 03
• Manual Hand Control for the Auto Guide Port - 31 Jul 03
• Celestron Now Offering Starbright XLT Enhanced Coatings on SCTs - 30 Jul 03
• No Response Errors - 22 May 03
• "No Response 1" Error When Checking Version on N8/9.25/11GPS - 22 Mar 04
• Celestron Introduces the NexStar 9.25 GPS - 15 May 03
• Incorrect Date/Time Displayed on GPS Models During Quick Align/Auto Align - 5 Apr 03
• Creating Index Marks for Hand Control 2.2 - 24 Feb 03
• Problems Obtaining GPS Link - 24 Dec 02
• Problems Encountered after Replacement of Motor Control Board in N11 - 14 Nov 02
• Manual Addendum for Upgraded GPS Hand Control - 27 Jul 02
• Alternate Locations for the Hand Control - 25 Jul 02
• First Fastar Lens Assembly for 11" SCTs Available - HyperStar from Starizona - 13 Jul 02
• Large Replacement Bolts for Your NexStar GPS Tripod - 8 Jul 02
• Jim Towers' Excellent Battery Tutorial and Guide - 7 Jun 02
• Correct Installation of the Finderscope - 26 May 02
• How to Fix Incorrect Local Time on GPS Hand Control - 22 May 02
• Possible Fixes for Hand Control Misbehavior - 11 May 02
• Polar Alignment Video for Wedge Mounted Scopes - 5 May 02
• Warning about Power Limit on the GPS 12V Output Jack - 30 Apr 02
• Determining the Version on Older NexStar GPS Scopes - 9 Apr 02
• Make an Accessory Tray for the Heavy Duty Tripod - 23 Feb 02
• Ease Collimation of the SCT NexStars with Bob's Knobs - 11 Jan 02
• Prevent your NexStar GPS from Looping Over 360° during Alignment - 11 Jan 02
• Error in Messier Object in GPS Version 1.2 Hand Control Database - 15 Dec 01
• Warming the Hand Control to Prevent Sluggish LCD - 17 Dec 01
• Correcting for Magnetic Declination Error on the GPS Models - 13 Dec 01
• NexStar Alignment Stars - 2 Dec 07
• Accurate Centering of Alignment Stars - 22 Aug 01
• Tripod Improvements - 14 Aug 01
• Replacing the Power Connector on Your Power Source - 20 Dec 00

Another source for NexStar information is the Yahoo NexStarGPS Group:
groups.yahoo.com/group/NexStarGPS