Orion poor

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Scheme drawing of the spiral arms of the Milky Way
orange: Orion arm;
red: Sagittarius arm;
mint green: Perseus arm

The Orion arm (also local arm ) is a spiral arm of the Milky Way , which among other things contains our solar system .

The Orion arm lies between the large Sagittarius arm and the Perseus arm and is probably a smaller branch. It is about 20,000 light years long, 2,000 light years wide, and about 26,000 light years from the Galactic Center . It is characterized by a number of hot class O and B stars , most of which belong to the constellation Orion . This is why it got its name, Orion Arm .

The sun and its system lies - in the longitudinal direction approximately in the middle - on the inner edge of the Orion arm, which is towards the galactic center.

Objects in the Orion arm and neighborhood

A mouse click on the labels of the objects on the following two cards leads to the relevant article, if available.

Up to 7,000 light years

Rosettennebel Krebsnebel Orionnebel Trifidnebel Lagunennebel Omeganebel Adlernebel Nordamerikanebel Rigel Oriongürtel Polarstern Sonne Beteigeuze Deneb Perseusarm Orionarm Sagittariusarm
The Orion Arm and its neighboring galactic spirals; Stars (blue), nebulae (red) (interactive map)

Up to 11,000 light years

Rosettennebel Seagull Nebula Konusnebel Kaliforniennebel Herznebel Orionnebel Soul Nebel Nordamerikanebel Kokon-Nebel Sadr (Stern) Cirrusnebel Trifidnebel Emissionsnebel NGC 6888 Lagunennebel Omeganebel Adlernebel Katzenpfotennebel Carinanebel Krebsnebel Messier 37 Messier 36 Messier 38 Messier 50 Messier 46 Messier 67 Messier 34 Messier 48 Messier 41 Messier 47 Messier 44 Plejaden Messier 37 Messier 52 Messier 93 Messier 7 Messier 6 Messier 25 Messier 23 Messier 21 Messier 18 Messier 26 Messier 11 Messier 35 NGC 2362 IC 2395 NGC 3114 NGC 3532 IC 1396 IC 2602 NGC 6087 NGC 6025 NGC 3766 NGC 4665 IC 2581 IC 2944 NGC 4755 NGC 3293 NGC 6067 NGC 6193 NGC 6231 NGC 6383 Tr 14 Tr 16 Messier 103 Messier 29 HPer Chi Per Col 228 O Vel Perseusarm Orionarm Sagittariusarm Sternhaufen Nebel
Interstellar nebulae (white) and star clusters (blue) up to 11,000 ly (interactive map)
Detailed view from the above map

Messier objects in the Orion arm

The Orion arm is home to the following Messier objects :

Surname Type Distance
in light years 		alternative
name
Butterfly cluster (M6) open star cluster 1600 NGC 6405
Ptolemy star cluster (M7) open star cluster 800 NGC 6475
M23 open star cluster 2150 NGC 6494
M25 open star cluster 4600 IC 4725
Dumbbell nebula (M27) planetary nebula 1360 NGC 6853
M29 open star cluster 4000 NGC 6913
M34 open star cluster 1400 NGC 1039
M35 open star cluster 2800 NGC 2168
M39 open star cluster 825 NGC 7092
Winnecke 4 (M40) Double star 560 (± 230)
M41 open star cluster 2300 NGC 2287
Orion Nebula (M42) Emission nebula 1350 NGC 1976
De Mairan's Nebula (M43) Gas mist 1300 NGC 1982
Praesepe (M44) open star cluster 577 NGC 2632
Pleiades (M45) open star cluster 440
M46 open star cluster 5400 NGC 2437
M47 open star cluster 1600 NGC 2422
M48 open star cluster 1500 NGC 2548
M50 open star cluster 3200 NGC 2323
Ring Nebula (M57) planetary nebula 2300 NGC 6720
M67 open star cluster 2700 NGC 2682
M73 Asterism 2500 NGC 6994
Small Dumbbell Nebula (M76) planetary nebula 3400 NGC 650
M78 Reflection fog 1600 NGC 2068
M93 open star cluster 3600 NGC 2447
Owl Nebula (M97) planetary nebula 2000 (± 500) NGC 3587

gallery

  • Spiral arms of the Milky Way

  • Orion track in the night sky

  • Orion arm from Sinai , Egypt

Web links

Individual evidence

  1. ↑ Messier objects in the Orion arm at SEDS (Students for the Exploration and Development of Space)