Talk:Centaurus A

message: I would like to suggest that the new ESA-APEX-Chandra image, now in the gallery below, be exchanged with one of the two images at the top.  They are both very good optical images, but showing the optical galaxy with the jets and the shocks all, together in one high-resolution image, is really stunning. Wwheaton (talk) 08:53, 31 January 2009 (UTC)
thread_title:  New image 

message: The three images currently shown in the Gallery are at very different angular scales.  The Chandra one is probably the smallest, likely smaller than the Spitzer IR one, and the submillimeter one is very much larger than either of the other two. Someone (probably me, but I am too busy just now) needs to track these down to the image archives and annotate the images to indicate the quantitative scales.  It is very confusing/deceptive as it stands. It would be great if the other two images in the article could be similarly annotated, for the same reasons.  Astronomers need to be more conscientious about this issue in general....  Wwheaton (talk) 16:23, 29 May 2009 (UTC)
thread_title:  Image gallery scales 

message: Exactly what Stephen O'Meara can or cannot see is very contentious. That last sentence, "Centaurus A has been spotted with the naked eye by Stephen James O'Meara" should be changed to something along the lines of "Centaurus A has been claimed to have been spotted with the naked eye by Stephen James O'Meara".  — Preceding unsigned comment added by Old wombat (talk • contribs) 10:32, 5 March 2011 (UTC)
replies: text: It's in the same difficulty level to spot as M81, so this should not be controversial. If you are James O'Meara, Brian skiff or someone similar who is used to doing this sort of thing, it's a piece of cake :) .Count Iblis (talk) 17:47, 23 June 2011 (UTC)

text: In fact, Brian Skiff has pointed out that Cen A, being where it is, is densely surrounded by bright blue stars, which will heavily interfere with any attempt to see it naked eye using averted vision. Unlike M81, out in the middle of nowhere. O'Meara's claim remains very questionable. Very questionable. Of course now, in 2023, we will never know. All relevant observers now are far far too old. 2001:8003:E490:7D01:ADD8:39B6:67E2:76FB (talk) 11:28, 17 April 2023 (UTC)
thread_title:  The O'Meara Allegation 

message: Hello! This is a note to let the editors of this article know that :File:ESO Centaurus A LABOCA.jpg will be appearing as picture of the day on March 17, 2014. You can view and edit the POTD blurb at Template:POTD/2014-03-17. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page. Thanks! — Crisco 1492 (talk) 23:59, 27 February 2014 (UTC)
thread_title:  [[:File:ESO Centaurus A LABOCA.jpg]] to appear as POTD 

message: "Spitzer Space Telescope studies have confirmed that Centaurus A is colliding with and devouring a smaller spiral galaxy.[citation needed]" -- last sentence of the introductory section.
So I found this source: http://www.spitzer.caltech.edu/images/1192-ssc2004-09a1-Dusty-Elliptical-Galaxy-Centaurus-A
that substantiates the claim, and it seems reliable.
I'll mess up the page if I try to edit it ... please ... could someone insert this link and clear the "citation needed" tag? 72.160.109.63 (talk) 01:58, 17 March 2014 (UTC)
thread_title:  Citation needed 

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thread_title:  External links modified 

message: According to https://www.constellation-guide.com/centaurus-a/, Centaurus A has the nickname "Hamburger Galaxy", which is identical to NGC 3628. Should this be included? --Τυχαίος Χρήστης (talk) 19:02, 25 June 2019 (UTC)
replies: text: No.  Virtually everyone else means NGC 3628. -- Elphion (talk) 21:04, 25 June 2019 (UTC)

text: Google would seem to indicate otherwise. -- Elphion (talk) 17:56, 26 June 2021 (UTC)
thread_title:  "Hamburger Galaxy" 

message: https://arxiv.org/abs/1907.02012
Need to wait for it to get through peer review mind.©Geni (talk) 02:46, 6 September 2019 (UTC)
replies: text: It had already passed peer review and was published on 26 August. Ruslik_Zero 08:42, 7 September 2019 (UTC)
thread_title: Paper on its satellite galaxies

message: The following Wikimedia Commons file used on this page has been nominated for deletion:
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Participate in the deletion discussion at the nomination page. —Community Tech bot (talk) 01:30, 9 January 2020 (UTC)
thread_title:  A Commons file used on this page has been nominated for deletion 

message: Should 'Surface Brightness' be added for distended objects in astronomical objects. It's a useful metric commonly used by visual astronomers to asses the ability to perceive an object and has a greater bearing on the objects visibility to an observer than simple brightness. It can be derived from the size and brightness of the object. More information here https://en.wikipedia.org/wiki/Surface_brightness Markustone (talk) 10:51, 15 June 2023 (UTC)
thread_title:  Surface Brightness