Click the Index button to download only an edition's index pdf, click the Planfile & Tours button to download only the AstroPlanner planfile(s) and tours. Use the green download button(s) to download a complete edition in the image orientation of your choice.
Please read Downloading CSOG, the CSOG Release Notes and the article iPad Astronomy.
Messier - Lacaille - Dunlop - Herschel - Caldwell - Bennett
Messier
The 109 (110?) Messier objects.
1850CDT..1784..227M - Charles Messier's "Connaissance des Temps - Catalogue des nebuleuses et des amas d'etoiles".
The Messier binocular edition can be downloaded on the Binocular Editions page.
Updated: 22 September 2025 - V3.0.1
Observing guides (pages): 161 (547)
Index files: 1
AstroPlanner planfiles: 1
Autostar Tours / NexTours / EQTours: 53
Argo Navis User Catalogs: 52
26 open clusters
29 globular clusters
7 nebulae
4 planetary nebulae
1 supernova remnant
39 (40) galaxies
1 asterism
1 star cloud
1 double star
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Lacaille
The 42 objects in Nicholas Louis de la Caille's "Catalog of Nebulae of the Southern Sky".
The Lacaille binocular edition can be downloaded on the Binocular Editions page.
Updated: 22 September 2025 - V3.0.1
Observing guides (pages): 67 (194)
Index files: 1
AstroPlanner planfiles: 1
Autostar Tours / NexTours / EQTours: 24
Argo Navis User Catalogs: 25
24 open clusters
9 globular clusters
3 nebulae
1 galaxy
5 asterisms
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Dunlop
James Dunlop's Catalog of Deepsky Objects.
Updated: 22 September 2025 - V3.0.1
Observing guides (pages): 364 (899)
Index files: 1
AstroPlanner planfiles: 1
Autostar Tours / NexTours / EQTours: 70
Argo Navis User Catalogs: 71
Downloads
- 1 of 2: Antlia through Dorado
- 2 of 2: Eridanus through Vela
156 open clusters
62 globular clusters
49 nebulae
1 dark nebula
4 planetary nebulae
56 galaxies
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Herschel
Friedrich William Herschel's catalog of deep sky objects.
When a Herschel galaxy is part of a close galaxy group, the complete group is included. For example: NGC536 in Andromeda is part of the galaxy group Hickson 10, NGC5596 in Serpens is part of Arp 72, NGC2278 in Lynx is part of Holmberg 112, etc.
The Herschel 400, Herschel II, Herschel 3 and Herschel Sprint editions can be downloaded from the Observing Programs page.
Updated: 22 September 2025 - V3.0.1
Observing guides (pages): 2533 (7280)
Index files: 64
AstroPlanner planfiles: 60
Autostar Tours / NexTours / EQTours: 196
Argo Navis User Catalogs: 255
Downloads
- 1 of 12: Andromeda through Auriga
- 2 of 12: Boötes through Cancer
- 3 of 12: Canes Venatici through Cepheus
- 4 of 12: Coma Berenices
- 5 of 12: Cetus through Delphinus
- 6 of 12: Draco through Hercules
- 7 of 12: Hydra through Leo
- 8 of 12: Leo Minor through Orion
- 9 of 12: Pegasus through Sagitta
- 10 of 12: Ursa Major
- 11 of 12: Virgo
- 12 of 12: Sagittarius through Vulpecula
152 open clusters
38 globular clusters
35 nebulae
6 HII regions
34 planetary nebulae
3 supernova remnants
2026 galaxies
34 asterisms
1 star cloud
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Caldwell
The 109 objects in Patrick Moore's list.
Updated: 22 September 2025 - V3.0.1
Observing guides (pages): 168 (506)
Index files: 1
AstroPlanner planfiles: 1
Autostar Tours / NexTours / EQTours: 76
Argo Navis User Catalogs: 77
28 open clusters
18 globular clusters
12 nebulae
12 planetary nebulae
2 supernova remnants
34 galaxies
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Bennett
The 152 objects in Jack Bennett's list.
Updated: 22 September 2025 - V3.0.1
Observing guides (pages): 199 (550)
Index files: 1
AstroPlanner planfiles: 1
Autostar Tours / NexTours / EQTours: 64
Argo Navis User Catalogs: 65
20 open clusters
72 globular clusters
4 nebulae
9 planetary nebulae
46 galaxies
1 star cloud
Click here to review the CSOG image orientations