Maggie

Short description: Molecular cloud in the Milky Way galaxy

MAggieNebula

Image of Maggie as seen by the Gaia satellite.

Observation data
Distance| 55,000 ly
Physical characteristics
Radius| 3,900 ly
See also: Lists of nebulae

Maggie is a vast cloud of hydrogen gas observed within our own Milky Way galaxy. It is a filament of hydrogen 3,900 light-years long and 130 light-years wide. It is a single coherent structure with all parts showing similar velocity with respect to the local standard of rest. It is one of the biggest structures within the Milky Way. "Maggie" is located about 55,000 light-years away (on the other side of the Milky Way). Maggie contains eight percent molecular hydrogen by mass fraction; the rest being atomic hydrogen.[1][2] It is hoped the cloud will provide clues to one of the earliest stages of star formation.[3]

It was first named by Colombian astronomer Juan D. Soler, an astrophysicist affiliated with the Istituto Nazionale di Astrofisica in Rome, Italy. He named it after the longest river in his native country, the Río Magdalena (Anglicized: Margaret, or "Maggie"). Astronomers discovered the cloud as part of The HI/OH/Recombination line survey of the Milky Way (THOR). It was first described in December 2021 in the journal Astronomy & Astrophysics.[4]

## References

1. ↑ Nielbock, Markus; MPIA (2021-12-20). "A gigantic lane made of raw material for new stars" (in en). https://www.mpia.de/news/science/2021-16-maggie.
2. ↑ Williams, Matt; Today, Universe. "Astronomers find the biggest structure in the Milky Way: A filament of hydrogen 3,900 light-years long" (in en). https://phys.org/news/2022-01-astronomers-biggest-milky-filament-hydrogen.html.
3. ↑ Research Highlight, Nature (2022-01-04). "A cloud named Maggie: space streamer could birth new stars" (in en). Nature 601 (7892): 168. doi:10.1038/d41586-021-03848-x. Bibcode: 2022Natur.601Q.168..
4. ↑ Syed, J.; Soler, J. D.; Beuther, H.; Wang, Y.; Suri, S.; Henshaw, J. D.; Riener, M.; Bialy, S. et al. (2022-01-01). "The "Maggie" filament: Physical properties of a giant atomic cloud" (in en). Astronomy & Astrophysics 657: A1. doi:10.1051/0004-6361/202141265. ISSN 0004-6361. Bibcode: 2022A&A...657A...1S.

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Aquila constellation

Stars
(list)|

| Bayer|

* α (Altair)
* β (Alshain)
* γ (Tarazed)
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* η
* θ (Tseen Foo)
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* ω1
* ω2

|

Flamsteed|

* 4
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* 12 (i)
* 14 (g)
* 15 (h)
* 18
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* 21
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* 26 (f)
* 27 (d)
* 28 (A)
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* 35 (c)
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* 37 (k)
* 42
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* 46
* 51
* 56
* 57
* 58
* 62
* 64
* 66
* 68
* 69
* 70
* 71 (l)
* 14 Sge
* 62 Ser

Variable|

* R
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* TT
* UU
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* CI
* DO
* EL
* FF
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* V346
* V368
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* V417
* V450
* V500
* V536
* V603
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* V725
* V794
* V803
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* V822
* V889
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* V1182
* V1208
* V1229
* V1286
* V1291
* V1302
* V1315
* V1333
* V1339
* V1370
* V1379
* V1401 (64 Sgr)
* V1402
* V1412
* V1413
* V1419
* V1425
* V1427
* V1429
* V1432
* V1449
* V1472
* V1493
* V1494
* V1654
* V1663
* V1691
* V1703

HR|

* 7085
* 7099
* 7143
* 7163
* 7208
* 7214
* 7269
* 7288
* 7300
* 7307
* 7313
* 7325
* 7349
* 7353
* 7354
* 7389
* 7396
* 7397
* 7404
* 7407
* 7412
* 7432
* 7438
* 7449
* 7456
* 7471
* 7516
* 7541
* 7542
* 7559
* 7562
* 7569
* 7598
* 7599
* 7636
* 7637
* 7648
* 7681
* 7693
* 7700
* 7717
* 7768
* 7794
* 7803
* 7809
* 7878

HD|

* 179079
* 179218
* 182040
* 183263
* 184279
* 185966
* 186535
* 187734
* 190073
* 192086
* 192699
* 194263
* 195617

Gliese|

* Gliese 735
* Gliese 752

Other|

* AFGL 2298
* B335
* CoRoT-2
* CoRoT-3
* CoRoT-8
* GRS 1915+105
* 1H 1905+000
* J1953−1019
* LDS 678
* NSVS 14256825
* PSR B1853+01
* PSR B1955+09
* PSR B1913+16 (Hulse–Taylor)
* PSR B1915+13
* PSR B1916+14
* PSR B1929+10
* PSR B1933+16
* PSR J1846-0258
* PSR J1903+0327
* PSR J1951+1123
* SGR 1900+14
* SS 433
* 4U 1907+09
* VB 10
* W43A
* W51 e2
* W51 North
* W51 IRS 2
* WR 123

Former|

* ρ (Tso Ke)
* 1
* 2
* 3
* 6
* 9

Star
clusters|

| Open|

* NGC 6709
* NGC 6755
* NGC 6756
* NGC 6837

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Globular|

* NGC 6749
* NGC 6760

Nebulae|

| Star-forming|

* G29.96-0.02
* G31.31+0.31
* G34.26+0.15
* G35.2-0.74
* G45.45+0.06
* W43
* W48
* W49
* W49A
* W49N
* W51
* W51A
* IRAS 19111+1048

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Planetary|

* Abell 58
* Abell 70
* IC 4846
* Me 1-1
* NGC 6741
* NGC 6751
* NGC 6772
* NGC 6778
* NGC 6781
* NGC 6790
* NGC 6803
* NGC 6804
* NGC 6807
* NGC 6852
* Sh 2-71
* Vy 2-2

SNR|

* 3C 391
* 3C 396
* 3C 397
* Kes 75
* Kes 79
* W44
* W49B
* W50
* W51C

Galaxies|

| NGC|

* 6814
* 6821
* 6865
* 6900
* 6901
* 6906
* 6915
* 6922
* 6926
* 6929
* 6941

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Other|

* 3C 403
* QSO B1937-1009

Other|

* Smith's Cloud

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