CSOG 3.0, published on 29 November 2024, was the last complete revision of the Clear Skies Observing guides: from here on, new editions will be added incrementally and existing content will receive interim updates.
With a publication of this magnitude (...), errors are inevitably going to creep up. These will be corrected in due time. I am expecting to post the first interim updates of CSOG editions in mid-2025.
If you come across something in CSOG that ought to be corrected, please let me know.
Known issues
Significant errors, inconsistencies, cosmetic issues etc. that were recognized and will be corrected with interim updates to applicable editions:
- The nebula NGC1999 in Orion in unmirrored editions has an image that is mirrored horizontally.
- The nebula Sharpless 2-127 in the 12-14" Cygnus Neb-2 guide has in image for the nebula Sharpless 1-88.
- Nova shells Cederblad 17 (GK Persei - the "Fireworks Nebula") in Perseus & Cederblad 155 (DQ Herculis) in Hercules and Cederblad 164 (V603 Aquilae) in Aquila & Cederblad 50 (T Aurigae) in Auriga are missing from the Burnham's Celestial Handbook - DSO's edition.
- The planetary nebula Haro 3-75 (PK 193-09.1) in Orion is incorrectly designated Henize 3-75. Affected guides are in the 8-10" & 12-14" editions.
- Incorrect coordinate for galaxy Abell 11 in Orion.
Last updated: 10 February 2025
Updated editions
- Messier Binocular edition. This edition was updated on 12 April 2025 and is marked as V1.1.
Editions in which a significant mistake was found that warranted an immediate update:
- Regions in the Large Magellanic Cloud - Pages in these guides were found to have a white background instead of CSOG's feature dark background: if you downloaded this edition before 28 December 2024, please download it again.
- The following downloads (unmirrored only) were updated to fix the image issue, as noted above, for NGC1999:
- 5-6" Constellation edition - download 2 of 2
- 8-10" Constellation edition - download 2 of 3
- 12-14" Constellation edition - download 6 of 8
- the Herschel edition - download 8 of 12
- the Herschel 400 observing program - download 2 of 2
- the Named Objects edition
- the Burnham's Celestial Handbook - DSO's edition
- the Herbig Nebulae edition
If you downloaded these editions before 31 January 2025, please download them again.
- The 12-14" Constellation edition - download 3 of 8 (all images orientations) was updated to fix the image issue, as noted above, for Sharpless 2-127.
If you do not wish to download all files as listed above, but instead prefer to replace only the affected observing guides, please click the download button below.
