Deep Sky Catalog
Messier objects, nebulae, galaxies, and clusters with observing guides by difficulty.
M76 (Little Dumbbell Nebula) Complete Guide — Planetary Nebula in Perseus
M76 (Little Dumbbell Nebula) Complete Guide — Planetary Nebula in Perseus
A complete observing guide for the Little Dumbbell Nebula (M76), a magnitude 10.1 planetary nebula in Perseus and the faintest object in Messier's catalog.
M1 (Crab Nebula) Complete Guide — Supernova Remnant in Taurus
M1 (Crab Nebula) Complete Guide — Supernova Remnant in Taurus
Observation guide for the Crab Nebula (M1). How to observe this magnitude 8.4 supernova remnant in the constellation Taurus.
M10 (NGC 6254) Observation Guide — Globular Cluster in Ophiuchus
M10 (NGC 6254) Observation Guide — Globular Cluster in Ophiuchus
Observation guide for M10 (NGC 6254). How to observe this magnitude 6.6 globular cluster in the constellation Ophiuchus.
M100 (NGC 4321) Observation Guide — Spiral Galaxy in Coma Berenices
M100 (NGC 4321) Observation Guide — Spiral Galaxy in Coma Berenices
Observation guide for M100 (NGC 4321). How to observe this magnitude 9.3 spiral galaxy in the constellation Coma Berenices.
M101 (Pinwheel Galaxy) Complete Guide — Spiral Galaxy in Ursa Major
M101 (Pinwheel Galaxy) Complete Guide — Spiral Galaxy in Ursa Major
Observation guide for the Pinwheel Galaxy (M101). How to observe this magnitude 7.9 spiral galaxy in the constellation Ursa Major.
M102 (NGC 5866) Observation Guide — Lenticular Galaxy in Draco
M102 (NGC 5866) Observation Guide — Lenticular Galaxy in Draco
Observation guide for M102 (NGC 5866). How to observe this magnitude 9.9 lenticular galaxy in the constellation Draco.
M103 (NGC 581) Observation Guide — Open Cluster in Cassiopeia
M103 (NGC 581) Observation Guide — Open Cluster in Cassiopeia
Observation guide for M103 (NGC 581). How to observe this magnitude 7.4 open cluster in the constellation Cassiopeia.
M104 (Sombrero Galaxy) Complete Guide — Spiral Galaxy in Virgo
M104 (Sombrero Galaxy) Complete Guide — Spiral Galaxy in Virgo
Observation guide for the Sombrero Galaxy (M104). How to observe this magnitude 8 spiral galaxy in the constellation Virgo.
M105 (NGC 3379) Observation Guide — Elliptical Galaxy in Leo
M105 (NGC 3379) Observation Guide — Elliptical Galaxy in Leo
Observation guide for M105 (NGC 3379). How to observe this magnitude 9.3 elliptical galaxy in the constellation Leo.
M106 (NGC 4258) Observation Guide — Spiral Galaxy in Canes Venatici
M106 (NGC 4258) Observation Guide — Spiral Galaxy in Canes Venatici
Observation guide for M106 (NGC 4258). How to observe this magnitude 8.4 spiral galaxy in the constellation Canes Venatici.
M107 (NGC 6171) Observation Guide — Globular Cluster in Ophiuchus
M107 (NGC 6171) Observation Guide — Globular Cluster in Ophiuchus
Observation guide for M107 (NGC 6171). How to observe this magnitude 7.9 globular cluster in the constellation Ophiuchus.
M108 (NGC 3556) Observation Guide — Spiral Galaxy in Ursa Major
M108 (NGC 3556) Observation Guide — Spiral Galaxy in Ursa Major
Observation guide for M108 (NGC 3556). How to observe this magnitude 10 spiral galaxy in the constellation Ursa Major.
M109 (NGC 3992) Observation Guide — Barred Spiral Galaxy in Ursa Major
M109 (NGC 3992) Observation Guide — Barred Spiral Galaxy in Ursa Major
M109 (NGC 3992) observation guide. Learn how to observe this magnitude 9.8 Barred Spiral Galaxy in Ursa Major.
M11 (Wild Duck Cluster) Complete Guide — Open Cluster in Scutum
M11 (Wild Duck Cluster) Complete Guide — Open Cluster in Scutum
Observation guide for the Wild Duck Cluster (M11). How to observe this magnitude 6.3 open cluster in the constellation Scutum.
M110 (NGC 205) Observation Guide — Elliptical Galaxy in Andromeda
M110 (NGC 205) Observation Guide — Elliptical Galaxy in Andromeda
Observation guide for M110 (NGC 205). How to observe this magnitude 8.5 elliptical galaxy in the constellation Andromeda.
M12 (NGC 6218) Observation Guide — Globular Cluster in Ophiuchus
M12 (NGC 6218) Observation Guide — Globular Cluster in Ophiuchus
Observation guide for M12 (NGC 6218). How to observe this magnitude 6.7 globular cluster in the constellation Ophiuchus.
M13 (Great Hercules Cluster) Complete Guide — Globular Cluster in Hercules
M13 (Great Hercules Cluster) Complete Guide — Globular Cluster in Hercules
Great Hercules Cluster (M13) observation guide. Learn how to observe this magnitude 5.8 Globular Cluster in Hercules.
M14 (NGC 6402) Observation Guide — Globular Cluster in Ophiuchus
M14 (NGC 6402) Observation Guide — Globular Cluster in Ophiuchus
Observation guide for M14 (NGC 6402). How to observe this magnitude 7.6 globular cluster in the constellation Ophiuchus.
M15 (Great Pegasus Cluster) Complete Guide — Globular Cluster in Pegasus
M15 (Great Pegasus Cluster) Complete Guide — Globular Cluster in Pegasus
Great Pegasus Cluster (M15) observation guide. Learn how to observe this magnitude 6.2 Globular Cluster in Pegasus.
M16 (Eagle Nebula) Complete Guide — Open Cluster in Serpens
M16 (Eagle Nebula) Complete Guide — Open Cluster in Serpens
Observation guide for the Eagle Nebula (M16). How to observe this magnitude 6.4 open cluster in the constellation Serpens.
M17 (Omega Nebula) Complete Guide — Diffuse Nebula in Sagittarius
M17 (Omega Nebula) Complete Guide — Diffuse Nebula in Sagittarius
Observation guide for the Omega Nebula (M17). How to observe this magnitude 7 diffuse nebula in the constellation Sagittarius.
M18 (NGC 6613) Observation Guide — Open Cluster in Sagittarius
M18 (NGC 6613) Observation Guide — Open Cluster in Sagittarius
Observation guide for M18 (NGC 6613). How to observe this magnitude 7.5 open cluster in the constellation Sagittarius.
M19 (NGC 6273) Observation Guide — Globular Cluster in Ophiuchus
M19 (NGC 6273) Observation Guide — Globular Cluster in Ophiuchus
Observation guide for M19 (NGC 6273). How to observe this magnitude 6.8 globular cluster in the constellation Ophiuchus.
M2 (NGC 7089) Observation Guide — Globular Cluster in Aquarius
M2 (NGC 7089) Observation Guide — Globular Cluster in Aquarius
Observation guide for M2 (NGC 7089). How to observe this magnitude 6.5 globular cluster in the constellation Aquarius.
M20 (Trifid Nebula) Complete Guide — Diffuse Nebula in Sagittarius
M20 (Trifid Nebula) Complete Guide — Diffuse Nebula in Sagittarius
Observation guide for the Trifid Nebula (M20). How to observe this magnitude 9 diffuse nebula in the constellation Sagittarius.
M21 (NGC 6531) Observation Guide — Open Cluster in Sagittarius
M21 (NGC 6531) Observation Guide — Open Cluster in Sagittarius
Observation guide for M21 (NGC 6531). How to observe this magnitude 6.5 open cluster in the constellation Sagittarius.
M22 (Sagittarius Cluster) Complete Guide — Globular Cluster in Sagittarius
M22 (Sagittarius Cluster) Complete Guide — Globular Cluster in Sagittarius
Sagittarius Cluster (M22) observation guide. Learn how to observe this magnitude 5.1 Globular Cluster in Sagittarius.
M23 (NGC 6494) Observation Guide — Open Cluster in Sagittarius
M23 (NGC 6494) Observation Guide — Open Cluster in Sagittarius
Observation guide for M23 (NGC 6494). How to observe this magnitude 6.9 open cluster in the constellation Sagittarius.
M24 (Sagittarius Star Cloud) Complete Guide — Milky Way Star Cloud in Sagittarius
M24 (Sagittarius Star Cloud) Complete Guide — Milky Way Star Cloud in Sagittarius
Observation guide for the Sagittarius Star Cloud (M24). How to observe this magnitude 4.6 Milky Way star cloud in the constellation Sagittarius.
M25 (IC 4725) Observation Guide — Open Cluster in Sagittarius
M25 (IC 4725) Observation Guide — Open Cluster in Sagittarius
Observation guide for M25 (IC 4725). How to observe this magnitude 6.5 open cluster in the constellation Sagittarius.
M26 (NGC 6694) Observation Guide — Open Cluster in Scutum
M26 (NGC 6694) Observation Guide — Open Cluster in Scutum
Observation guide for M26 (NGC 6694). How to observe this magnitude 8 open cluster in the constellation Scutum.
M27 (Dumbbell Nebula) Complete Guide — Planetary Nebula in Vulpecula
M27 (Dumbbell Nebula) Complete Guide — Planetary Nebula in Vulpecula
Observation guide for the Dumbbell Nebula (M27). How to observe this magnitude 7.4 planetary nebula in the constellation Vulpecula.
M28 (NGC 6626) Observation Guide — Globular Cluster in Sagittarius
M28 (NGC 6626) Observation Guide — Globular Cluster in Sagittarius
Observation guide for M28 (NGC 6626). How to observe this magnitude 6.8 globular cluster in the constellation Sagittarius.
M29 (NGC 6913) Observation Guide — Open Cluster in Cygnus
M29 (NGC 6913) Observation Guide — Open Cluster in Cygnus
Observation guide for M29 (NGC 6913). How to observe this magnitude 7.1 open cluster in the constellation Cygnus.
M3 (NGC 5272) Observation Guide — Globular Cluster in Canes Venatici
M3 (NGC 5272) Observation Guide — Globular Cluster in Canes Venatici
Observation guide for M3 (NGC 5272). How to observe this magnitude 6.2 globular cluster in the constellation Canes Venatici.
M30 (NGC 7099) Observation Guide — Globular Cluster in Capricornus
M30 (NGC 7099) Observation Guide — Globular Cluster in Capricornus
Observation guide for M30 (NGC 7099). How to observe this magnitude 7.2 globular cluster in the constellation Capricornus.
M31 (Andromeda Galaxy) Complete Guide — Spiral Galaxy in Andromeda
M31 (Andromeda Galaxy) Complete Guide — Spiral Galaxy in Andromeda
Observation guide for the Andromeda Galaxy (M31). How to observe this magnitude 3.4 spiral galaxy in the constellation Andromeda.
M32 (NGC 221) Observation Guide — Elliptical Galaxy in Andromeda
M32 (NGC 221) Observation Guide — Elliptical Galaxy in Andromeda
Observation guide for M32 (NGC 221). How to observe this magnitude 8.1 elliptical galaxy in the constellation Andromeda.
M33 (Triangulum Galaxy) Complete Guide — Spiral Galaxy in Triangulum
M33 (Triangulum Galaxy) Complete Guide — Spiral Galaxy in Triangulum
Observation guide for the Triangulum Galaxy (M33). How to observe this magnitude 5.7 spiral galaxy in the constellation Triangulum.
M34 (NGC 1039) Observation Guide — Open Cluster in Perseus
M34 (NGC 1039) Observation Guide — Open Cluster in Perseus
Observation guide for M34 (NGC 1039). How to observe this magnitude 5.5 open cluster in the constellation Perseus.
M35 (NGC 2168) Observation Guide — Open Cluster in Gemini
M35 (NGC 2168) Observation Guide — Open Cluster in Gemini
Observation guide for M35 (NGC 2168). How to observe this magnitude 5.3 open cluster in the constellation Gemini.
M36 (NGC 1960) Observation Guide — Open Cluster in Auriga
M36 (NGC 1960) Observation Guide — Open Cluster in Auriga
Observation guide for M36 (NGC 1960). How to observe this magnitude 6.3 open cluster in the constellation Auriga.
M37 (NGC 2099) Observation Guide — Open Cluster in Auriga
M37 (NGC 2099) Observation Guide — Open Cluster in Auriga
Observation guide for M37 (NGC 2099). How to observe this magnitude 6.2 open cluster in the constellation Auriga.
M38 (NGC 1912) Observation Guide — Open Cluster in Auriga
M38 (NGC 1912) Observation Guide — Open Cluster in Auriga
Observation guide for M38 (NGC 1912). How to observe this magnitude 7.4 open cluster in the constellation Auriga.
M39 (NGC 7092) Observation Guide — Open Cluster in Cygnus
M39 (NGC 7092) Observation Guide — Open Cluster in Cygnus
Observation guide for M39 (NGC 7092). How to observe this magnitude 4.6 open cluster in the constellation Cygnus.
M4 (NGC 6121) Observation Guide — Globular Cluster in Scorpius
M4 (NGC 6121) Observation Guide — Globular Cluster in Scorpius
Observation guide for M4 (NGC 6121). How to observe this magnitude 5.6 globular cluster in the constellation Scorpius.
M40 (Winnecke 4) Complete Guide — Double Star in Ursa Major
M40 (Winnecke 4) Complete Guide — Double Star in Ursa Major
Winnecke 4 (M40) observation guide. Learn how to observe this magnitude 8.4 Double Star in Ursa Major.
M41 (NGC 2287) Observation Guide — Open Cluster in Canis Major
M41 (NGC 2287) Observation Guide — Open Cluster in Canis Major
Observation guide for M41 (NGC 2287). How to observe this magnitude 4.6 open cluster in the constellation Canis Major.
M42 (Orion Nebula) Complete Guide — Diffuse Nebula in Orion
M42 (Orion Nebula) Complete Guide — Diffuse Nebula in Orion
Observation guide for the Orion Nebula (M42). How to observe this magnitude 4 diffuse nebula in the constellation Orion.
M43 (De Mairan's Nebula) Complete Guide — Diffuse Nebula in Orion
M43 (De Mairan's Nebula) Complete Guide — Diffuse Nebula in Orion
De Mairan's Nebula (M43) observation guide. Learn how to observe this magnitude 9 Diffuse Nebula in Orion.