Clear Skies Newsletter

Clear Skies Newsletter

2 January 2026

Fellow stargazer,
Here's to a New Year with plenty of clear nights and steady skies!
This week the Clear Skies website was updated with:

In other news

  • The CSOG outlook for 2026
  • Renewing CSOG registrations & support donations

Deep Sky Forum's Object of the Week

Week 52, 2025

posted on: 28 December

Double star "Castor" - Alpha Geminorum (STF1110 - WDS07346+3153) in Gemini

Double star "Castor" - Alpha Geminorum (STF1110 - WDS07346+3153) in Gemini
Double star "Castor" - Alpha Geminorum (STF1110 - WDS07346+3153) in Gemini
This double star is included in CSOG's:

Galaxy group Lyon Galaxy Group 146 - the "NGC2410 Group" in Gemini

Some members of this group are listed incorrectly in the forum post, but here's LGG 146 according to the original catalog data.
Galaxy group Lyon Galaxy Group 146 - the "NGC2410 Group" in Gemini
These galaxies are included in CSOG's:

Galaxy cluster Abell 586 in Gemini

Nothing to see here.
Galaxy cluster Abell 586 in Gemini
Galaxy cluster Abell 586 in Gemini

Cloudy Nights' Monthly Challenge Objects

January

posted on: 29 December

Planetary nebula NGC1514 - the "Crystal Ball Nebula" in Taurus

Planetary nebula NGC1514 - the "Crystal Ball Nebula" in Taurus
Planetary nebula NGC1514 - the "Crystal Ball Nebula" in Taurus
This object is included in CSOG's:
- Constellation editions by telescope aperture
- Herschel edition
- Cederblad Nebulae edition
- Burnham's Celestial Handbook - DSO's edition
- Named Objects edition
- Herschel II observing program
- Deep Sky Forum's Objects of the Week 2022 - Week 1
- Deep Sky Forum's Objects of the Week 2015 - Week 47
- Webb Deep-Sky Society's Objects of the Month - 2024
- Webb Deep-Sky Society's Objects of the Season - Winter 2021
- Astrotreff's Objects of the Month - November 2025

Planetary nebula Kohoutek 2-2 in Monoceros

Planetary nebula Kohoutek 2-2 in Monoceros
Planetary nebula Kohoutek 2-2 in Monoceros
Planetary nebula Kohoutek 2-2 in Monoceros

Planetary nebula Stephenson 3-1 in Monoceros

Planetary nebula Stephenson 3-1 in Monoceros
Planetary nebula Stephenson 3-1 in Monoceros
This object is included in CSOG's:
- 12-14" Constellation edition

Webb Deep-Sky Society's Objects of the Month

January

posted on: 1 January

Galaxy NGC936 - the "TIE Fighter Galaxy" in Cetus

Unknown to me, there's a second TIE Fighter out there; the other one being NGC4725 in Coma Berenices. I updated all guides and field descriptions containing NGC936 and added it to the Named Objects edition. These changes will be fielded with the next interim update to CSOG.
Galaxy NGC936 - the "TIE Fighter Galaxy" in Cetus
Galaxy NGC936 - the "TIE Fighter Galaxy" in Cetus
Galaxy NGC936 - the "TIE Fighter Galaxy" in Cetus
This object is included in CSOG's:
- Constellation editions by telescope aperture
- Herschel edition
- Burnham's Celestial Handbook - DSO's edition
- Herschel 400 observing program

Galaxy NGC941 in Cetus

Galaxy NGC941 in Cetus
Galaxy NGC941 in Cetus
Galaxy NGC941 in Cetus
This object is included in CSOG's:
- 8-10" & 12-14" Constellation editions
- Herschel edition
- Burnham's Celestial Handbook - DSO's edition
- Herschel 3 observing program

Reflection nebula IC447 - "Dreyer's Nebula" & open cluster Collinder 95 in Monoceros

Reflection nebula IC447 - "Dreyer's Nebula" & open cluster Collinder 95 in Monoceros
Reflection nebula IC447 - "Dreyer's Nebula" & open cluster Collinder 95 in Monoceros
Reflection nebula IC447 - "Dreyer's Nebula" & open cluster Collinder 95 in Monoceros
This object is included in CSOG's:
- 8-10" & 12-14" Constellation editions
- Hubble Nebulae edition
- Cederblad Nebulae edition
- Dorschner-Gürtler Nebulae edition
- Van den Bergh Reflection Nebulae edition
- Rojkovskij-Kurchakov Nebulae edition
- Bernes Bright Nebulae edition
- Collinder Star Clusters edition
- Named Objects edition
- Deep Sky Forum's Objects of the Week 2021 - Week 2

Reflection nebula NGC2245 in Monoceros

This object previously featured as a Webb OotM in January 2023.
Reflection nebula NGC2245 in Monoceros
Reflection nebula NGC2245 in Monoceros
Reflection nebula NGC2245 in Monoceros
This object is included in CSOG's:
- Constellation editions by telescope aperture
- Herschel edition
- Hubble Nebulae edition
- McDonald Nebulae & Regions edition
- Cederblad Nebulae edition
- Herbig Nebulae edition
- Struve-Straka Nebulae edition
- Dorschner-Gürtler Nebulae edition
- Parsamian Cometary Nebulae edition
- Rojkovskij-Kurchakov Nebulae edition
- Bernes Bright Nebulae edition
- Burnham's Celestial Handbook - DSO's edition
- Herschel II observing program
- Webb Deep-Sky Society's Objects of the Month - January 2023

Double star Engelmann 22 (WDS05413+5329) in Auriga

The Washington Double Star Catalog assigns the letters A, S, T, U & V for the components of this double star. I decided to go with A through E.
Double star Engelmann 22 (WDS05413+5329) in Auriga
Double star Engelmann 22 (WDS05413+5329) in Auriga

Double star "Adhara" - Epsilon Canis Majoris (Cape Observatory 7 - WDS06586-2858) in Canis Major

Double star "Adhara" - Epsilon Canis Majoris (Cape Observatory 7 - WDS06586-2858) in Canis Major
Double star "Adhara" - Epsilon Canis Majoris (Cape Observatory 7 - WDS06586-2858) in Canis Major
This object is included in CSOG's:
- Burnham's Celestial Handbook - Double Stars edition

Astrotreff's Object of the Month

January

posted on: 1 January

drum roll...

Emission nebula Messier 42 (NGC1976) - the "Great Orion Nebula" in Orion

Emission nebula Messier 42 (NGC1976) - the "Great Orion Nebula" in Orion
Emission nebula Messier 42 (NGC1976) - the "Great Orion Nebula" in Orion
Emission nebula Messier 42 (NGC1976) - the "Great Orion Nebula" in Orion
This object is included in CSOG's:
- Constellation editions by telescope aperture
- Messier editions
- Hubble Nebulae edition
- Cederblad Nebulae edition
- Strohmeier Nebulae edition
- Courtès Nebulae edition
- Gaze-Shajn Nebulae edition
- Sharpless Nebulae edition
- Bernes Bright Nebulae edition
- Burnham's Celestial Handbook - DSO's edition
- Named Objects edition
- Astronomy Magazine's 101 Weirdest Cosmic Objects edition
- ASSA Top-100 observing program
- Astronomy Magazine's 101 Cosmic Objects You Must See edition
- Deep Sky Forum's Objects of the Week 2017 - Week 2

New CSOG Downloads

With publication of these new downloads, the pages CSOG Release Notes & Statistics and Future CSOG were updated.

CSOG in 2026

The aim is to publish at least one new CSOG edition in every month of 2026. Order of appearance may change, but here's the plan:
With publication of guides for the final year (2012) in March, I will add an index file for all DSF OotW's, an AstroPlanner planfile and Tour files.
  • Herschel double stars - April
  • All Astrotreff's Objects of the Month for the year 2019 - May
  • All Astrotreff's Objects of the Month for the year 2018 - June
  • All Astrotreff's Objects of the Month for the year 2017 - July
  • All Astrotreff's Objects of the Month for the year 2016 - August
With publication of guides for the final year (2016) in August, I will add an index file for all Astrotreff OotM's, an AstroPlanner planfile and Tour files.
  • Kohoutek nebulae - September
  • All the Webb Deep-Sky Society's Objects of the Month for the years 2019 to 2006, striving for one per month, going backwards in time
  • Rodgers, Campbell, Whiteoak nebulae - Late 2026 ?
  • An interim update to various CSOG editions - Late 2026 ?
In between, I will try to fit is as many observing programs for star parties as possible, whenever I see a list of objects shared on the web. These make for an excellent opportunity to share CSOG content; as an introduction and to provide further detail to enhance the experience at the eyepiece. As always, these observing programs will be available for free for the duration of the star party, without the need to register.

    Renewing CSOG Registrations & Support Donations

    CSOG cannot exist without support.

    Registration and a support donations gives access to all CSOG content - currently 105 editions and 26 'Periodicals' - for the duration of one year (365 days). Once the year has expired, a new support donation is required to continue to have access to all CSOG content and any new or updated edition published in the year ahead.

    Once a registration has expired, logging in to the Clear Skies website will lead you to a Registration Renewal page. You will not see this page until one year after you last made a CSOG support donation. Once a registration and support donation is renewed, access to CSOG is reactivated for another year.
    CSOG Registration & Support Renewal

      Coming very soon

      New CSOG Download

      Once the first Object of the Week for 2026 is posted on Deepsky Forum, I will add a new download to the website for all DSF OotW's in the year 2025, including an index file and an AstroPlanner planfile.

      New CSOG edition

      Mid-January I will publish a new CSOG edition for all Deep Sky Forum's Objects of the Week for the year 2014. An index file and AstroPlanner planfile will be included.
      All Deepsky Forum's Objects of the Week for the year 2025
      All Deepsky Forum's Objects of the Week for the year 2014

      Coming soon...

      Future updates to the Clear Skies website will include:
      Weekly updates
      Monthly updates
      Seasonal Updates
      Other
      Clear skies (.eu),
      Victor van Wulfen
      custom custom custom custom custom custom custom