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Michael PorterMore in the "Don't trust search results" department - This isn't even AI-generated, it seems to be just a misconception on the part of the author.Okay - While searching for a rough estimate of the size of the observable universe at various ages, I found an excerpt from an Encyclopedia Britannica page (URL in the alt text) that sounded wrong - that the observable universe expands by one light year per year. I plugged some rough numbers into Wolfram Alpha and got a value of 6.7 ly. (I like Wolfram Alpha - it usually makes the right assumptions about what I'm looking for 👍🏻)The EB article also states that as time goes by, we will be able to see *more* of the universe as light eventually reaches us from farther objects. This is exactly wrong - as the universe expands, more and more objects will recede faster than the speed of light and we will see less, not more. (Not to mention that there's a hard limit on the time during which objects that could emit light actually existed)Am I missing something? I'm always wary of forgetting a factor of 2 or something in this kind of calculation...<a href="https://ottawa.place/tags/Astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astronomy</a> <a href="https://ottawa.place/tags/Cosmology" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cosmology</a> <a href="https://ottawa.place/tags/HubbleConstant" class="mention hashtag" rel="nofollow noopener" target="_blank">#HubbleConstant</a>

Daniel PomarèdeOn France Culture today: The Hubble Tension... in an interview by the excellent Celine Loozen I talk about our Cosmicflows-4 measurement of the Hubble Constant, as well as the value inferred from Ho'oleilana, that are both exacerbating the tension.▶ at t=33:30 <a href="https://www.radiofrance.fr/franceculture/podcasts/la-science-cqfd/constante-de-hubble-la-tension-monte-7710009" rel="nofollow noopener" translate="no" target="_blank">https://www.radiofrance.fr/franceculture/podcasts/la-science-cqfd/constante-de-hubble-la-tension-monte-7710009</a><a href="https://mastodon.social/tags/Cosmology" class="mention hashtag" rel="nofollow noopener" target="_blank">#Cosmology</a> <a href="https://mastodon.social/tags/Hubble" class="mention hashtag" rel="nofollow noopener" target="_blank">#Hubble</a> <a href="https://mastodon.social/tags/HubbleConstant" class="mention hashtag" rel="nofollow noopener" target="_blank">#HubbleConstant</a> <a href="https://mastodon.social/tags/HubbleTension" class="mention hashtag" rel="nofollow noopener" target="_blank">#HubbleTension</a> <a href="https://mastodon.social/tags/Hooleilana" class="mention hashtag" rel="nofollow noopener" target="_blank">#Hooleilana</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> <a href="https://mastodon.social/tags/Astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#Astrodon</a>

Daniel FischerStatus Report on the Chicago-Carnegie Hubble Program (CCHP) - Three Independent Astrophysical Determinations of the <a href="https://scicomm.xyz/tags/HubbleConstant" class="mention hashtag" rel="nofollow noopener" target="_blank">#HubbleConstant</a> Using the James Webb Space Telescope: <a href="https://arxiv.org/abs/2408.06153" rel="nofollow noopener" translate="no" target="_blank">https://arxiv.org/abs/2408.06153</a> -> Space telescope data reignite debate over how fast universe is expanding—and whether ‘new physics’ is needed: <a href="https://www.science.org/content/article/space-telescope-data-reignite-debate-over-how-fast-universe-expanding-and-whether-new" rel="nofollow noopener" translate="no" target="_blank">https://www.science.org/content/article/space-telescope-data-reignite-debate-over-how-fast-universe-expanding-and-whether-new</a> - triple measurement of the Hubble constant using JWST suggests unidentified biases may account for disparate results.

IT NewsStudy: Conflicting values for Hubble constant not due to measurement error - Enlarge / This image of NGC 5468, about 130 million light-years from Ea... - <a href="https://arstechnica.com/?p=2009332" rel="nofollow noopener" translate="no" target="_blank">https://arstechnica.com/?p=2009332</a> <a href="https://schleuss.online/tags/expansionoftheuniverse" class="mention hashtag" rel="nofollow noopener" target="_blank">#expansionoftheuniverse</a> <a href="https://schleuss.online/tags/hubbleconstant" class="mention hashtag" rel="nofollow noopener" target="_blank">#hubbleconstant</a> <a href="https://schleuss.online/tags/webbtelescope" class="mention hashtag" rel="nofollow noopener" target="_blank">#webbtelescope</a> <a href="https://schleuss.online/tags/astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrophysics</a> <a href="https://schleuss.online/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a>

Daniel PomarèdeLast but not least, a new measurement of the Hubble Constant is obtained by analyzing the geometrical properties of Ho'oleilana: 76.9 (+8.2)(-4.8) km/s /MpcThis value is consistent with other direct local probes, and further exacerbates the "Hubble tension" in the ΛCDM model.<a href="https://mastodon.social/tags/ho" class="mention hashtag" rel="nofollow noopener" target="_blank">#ho</a>'oleilana <a href="https://mastodon.social/tags/hooleilana" class="mention hashtag" rel="nofollow noopener" target="_blank">#hooleilana</a> <a href="https://mastodon.social/tags/cosmology" class="mention hashtag" rel="nofollow noopener" target="_blank">#cosmology</a> <a href="https://mastodon.social/tags/bao" class="mention hashtag" rel="nofollow noopener" target="_blank">#bao</a> <a href="https://mastodon.social/tags/baryon" class="mention hashtag" rel="nofollow noopener" target="_blank">#baryon</a> <a href="https://mastodon.social/tags/acoustic" class="mention hashtag" rel="nofollow noopener" target="_blank">#acoustic</a> <a href="https://mastodon.social/tags/oscillations" class="mention hashtag" rel="nofollow noopener" target="_blank">#oscillations</a> <a href="https://mastodon.social/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://mastodon.social/tags/astrophysics" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrophysics</a> <a href="https://mastodon.social/tags/astrodon" class="mention hashtag" rel="nofollow noopener" target="_blank">#astrodon</a> <a href="https://mastodon.social/tags/universe" class="mention hashtag" rel="nofollow noopener" target="_blank">#universe</a> <a href="https://mastodon.social/tags/space" class="mention hashtag" rel="nofollow noopener" target="_blank">#space</a> <a href="https://mastodon.social/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a> <a href="https://mastodon.social/tags/research" class="mention hashtag" rel="nofollow noopener" target="_blank">#research</a> <a href="https://mastodon.social/tags/discovery" class="mention hashtag" rel="nofollow noopener" target="_blank">#discovery</a> <a href="https://mastodon.social/tags/physics" class="mention hashtag" rel="nofollow noopener" target="_blank">#physics</a> <a href="https://mastodon.social/tags/theory" class="mention hashtag" rel="nofollow noopener" target="_blank">#theory</a> <a href="https://mastodon.social/tags/bigbang" class="mention hashtag" rel="nofollow noopener" target="_blank">#bigbang</a> <a href="https://mastodon.social/tags/lcdm" class="mention hashtag" rel="nofollow noopener" target="_blank">#lcdm</a> <a href="https://mastodon.social/tags/hubble" class="mention hashtag" rel="nofollow noopener" target="_blank">#hubble</a> <a href="https://mastodon.social/tags/hubbleconstant" class="mention hashtag" rel="nofollow noopener" target="_blank">#hubbleconstant</a>

IT NewsGravitational lens gives us a third estimate of the Universe’s expansion - Enlarge / The arc of thin, distorted objects around the center of this ... - <a href="https://arstechnica.com/?p=1939056" rel="nofollow noopener" target="_blank">https://arstechnica.com/?p=1939056</a> <a href="https://schleuss.online/tags/gravitationallensing" class="mention hashtag" rel="nofollow noopener" target="_blank">#gravitationallensing</a> <a href="https://schleuss.online/tags/hubbleconstant" class="mention hashtag" rel="nofollow noopener" target="_blank">#hubbleconstant</a> <a href="https://schleuss.online/tags/astronomy" class="mention hashtag" rel="nofollow noopener" target="_blank">#astronomy</a> <a href="https://schleuss.online/tags/supernova" class="mention hashtag" rel="nofollow noopener" target="_blank">#supernova</a> <a href="https://schleuss.online/tags/science" class="mention hashtag" rel="nofollow noopener" target="_blank">#science</a>

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