Talk:Small Sagittarius Star Cloud

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The article talks about the "Sagittarius Star Cloud". However, there are two of them. The Large Sagittarius Star Cloud and the Small Sagittarius Star Cloud. M24 or Delle Caustiche is really the Small Sagittarius Star Cloud. Furthermore, NGC 6603 is merely contained in M24 and is not equal to M24.

Wikipedia welcomes everyone to add information to articles that are verifiable and accurate. You are encouraged to be bold and change the article to better reflect the fact.--Kalsermar 15:40, 24 December 2005 (UTC)

References that may add more information to this article:

Aller, L. H. “Turbulence in the Interstellar Medium.” The Astrophysical Journal, vol. 113, 1951, p. 120., doi:10.1086/145382. (http://adsabs.harvard.edu/full/1951ApJ...113..120A)

A.F.J, Moffat, and Vogt N. “The Bright Star Cloud in Sagittarius at l = 12, b = -1.” Astronomy and Astrophysics, vol. 41, July 1975, pp. 413–422. (http://adsabs.harvard.edu/full/1975A%26A....41..413M)

French, Sue. "Small Sagittarius star cloud: the Sagittarius Milky Way is host to dark nebulae and open clusters." Sky & Telescope, July 2015, p. 56+. Academic OneFile, http://link.galegroup.com/apps/doc/A417569982/AONE?u=mcc_pv&sid=AONE&xid=7472cfc9. Accessed 14 Feb. 2018. (T5113 (talk) 06:20, 15 February 2018 (UTC))

Wiki Education Foundation-supported course assignment

This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Student editor(s): T5113.

Above undated message substituted from Template:Dashboard.wikiedu.org assignment by PrimeBOT (talk) 09:31, 17 January 2022 (UTC)

Peer Review

You added a good amount of information to the article Sagittarius Star Cloud. It was clear enough to follow and it flowed nicely with the rest of the article. I didn't see any grammar issues, and there are only two run-on sentences both in the third paragraph. In the third paragraph, maybe adding a transition towards the end to better transition into the last paragraph. Overall great work! — Preceding unsigned comment added by MAR2391497 (talk • contribs) 05:12, 26 March 2018 (UTC)

Moved and renamed

After 15 years (see above), there is now a separate Large Sagittarius Star Cloud article. I have moved this article to add "Small" to the name, and added disambiguation. Assambrew (talk) 21:10, 23 September 2020 (UTC)

Which arm?

The article states: The stars, clusters and other objects comprising M24 are part of the Sagittarius or Sagittarius-Carina arms of the Milky Way galaxy.

This statement (present since the article's creation) appears to be incorrect, though I have seen this repeated in several sources. By contrast, Crossen and Tirion put the distance to Small Cloud objects at 16,000 ly, about twice the distance of the Sagittarius Arm, and later state that "The dark interstellar matter framing the distant Small Sagittarius Star Cloud is associated with the third galactic structure visible in Sagittarius [i.e, the third after the Great and Small Clouds], the Sagittarius-Carina Arm, the next arm in from the Sun's. Crossen and Rehman (referenced in our article) state explicitly that ""We view M24 through a 'window' in the dust of the Str-Car Arm. The Sgr-Car dust lane is about 5,000 to 7,000 light-years away, the star cloud itself centered perhaps twice as far."

Similarly, the S & T article by Sue French (referenced in our article), states: "For the most part, the stars that lie along this section of the Milky Way, as well as the dark clouds that decorate it, lie within the Sagittarius-Carina Arm of our galaxy. This is the next spiral arm inward from ours, and it blocks the view beyond. Within the dark rift, however, a gap allows us to peer deeper into the galaxy. The stars that shine through this hole make up Messier 24, the Small Sagittarius Star Cloud."

My guess is that the other sources have misread sources like these, concluding that the Small Cloud itself is part of the Sagittarius Arm. But the Small Cloud bears no resemblance to other objects that are in the Small Cloud Sagittarius Arm, like M8, M20, M17, the False Comet, or the Carina Nebula. Such objects can be resolved in much more detail than the objects in M24, because they are much closer.

References

Elphion (talk) 19:42, 2 August 2022 (UTC)