Talk:List of voids

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Article-ize

I am preparing to split the list of voids off the void (astronomy) article, and am using a subpage here as a scratchpad. It'll take a while to do... 76.66.196.139 (talk) 04:06, 21 September 2009 (UTC)[reply]

Additional

Bibcode:1988ARA&A..26..245R - this should be useful in building the list. 76.66.197.30 (talk) 14:05, 22 September 2009 (UTC)[reply]

Someone may wish to add the voids found in Bibcode:1995A&A...301..329L to the list... 76.66.197.30 (talk) 13:28, 24 September 2009 (UTC)[reply]

There's also this one: [1] – 76.66.197.30 (talk) 13:36, 24 September 2009 (UTC)[reply]

km/s

Why are some of the sizes for the voids in km/s? Is it a typo, did you mean Mpc? 10:48, 23 September 2011 (UTC) — Preceding unsigned comment added by 24.12.201.202 (talk)

No, it is not a typo, it is measured in terms of km/s, due to a different coordinate system (redshift space) -- 70.51.44.60 (talk) 07:31, 24 November 2015 (UTC)[reply]

Eridanus Issues, plus confusing units

In general this article mixes units (Mpc, Mpc/h, km/s) without explaining what any of them stand for, nor the relation between them. In the case of the (disputed) Eridanus Supervoid, two different diameters are given (150 Mpc in the Diameter column, and 300 Mpc/h in the adjacent notes). It is described as much larger than other voids, despite the 'Giant Void in NGH' discovered in 1988 being given as 300-400 Mpc in diameter. This is not entirely trivial, as there seems to be a Laura Mersini fan club out there intent on claiming that she is the next Einstein and has discovered another universe by allegedly predicting the (disputed) CMB Cold Spot, which is associated with the (disputed) Eridanus Supervoid. So could somebody with the requisite knowledge please tidy up this stuff? Tlhslobus (talk) 17:39, 11 February 2013 (UTC)[reply]

It could be considered WP:Original research, if that number isn't found elsewhere. Particularly, converting km/s to Mpc would need a particular Hubble constant. If we want a particular set standard unit, it would be km/s, as those are what the observations measure (calculated differences in redshift numbers). The interpretation as megaparsecs would need a particular model of the universe with the Hubble Constant. As "h" is not well defined, and disputed with the Hubble tension converging to two different numbers. -- 64.229.88.34 (talk) 04:14, 31 August 2024 (UTC)[reply]

Also, a conversion template should be used if we do convert to megaparsecs from km/s, since then we could just replace the Hubble constant with a more accepted value should the state of cosmological research find an agreed-to number to use. The convention of H₀ = 50 or 75 would need to have references to the acceptability of that convention in astronomy -- 64.229.88.34 (talk) 04:14, 31 August 2024 (UTC)[reply]

As h appears to be known to an accuracy of ≈ 2% or less, would it be acceptable to convert all distances in the tables to Mpc, so that they are all consistent?---Ehrenkater (talk) 21:15, 13 October 2020 (UTC)[reply]

KBC Void

Where is the KBC Void on the main picture in the article. Is the KBC void the largest void? Lets get more information on this.--Mapsfly (talk) 20:20, 8 January 2022 (UTC)[reply]