For those interested in learning more about the Cosmological Principle<p>PSB Spacetime- Where Is The Center of The Universe?<p><a href="https://www.youtube.com/watch?v=BOLHtIWLkHg" rel="nofollow">https://www.youtube.com/watch?v=BOLHtIWLkHg</a><p>Giant Arc 3.3 Billion Light Years Long That Shouldn't Really Exist:<p><a href="https://www.youtube.com/watch?v=Wj1ULGmPe6s" rel="nofollow">https://www.youtube.com/watch?v=Wj1ULGmPe6s</a><p>The Case Against the Cosmological Principle (and/or FLRW) - Jenny Wagner:<p><a href="https://www.youtube.com/watch?v=nASUsWQyemc" rel="nofollow">https://www.youtube.com/watch?v=nASUsWQyemc</a><p>SciShow- What If the Universe Isn't Uniform?<p><a href="https://www.youtube.com/watch?v=YGVW4BaA0qA" rel="nofollow">https://www.youtube.com/watch?v=YGVW4BaA0qA</a>
The bbc has a better article in their science section at <a href="https://www.bbc.co.uk/future/article/20230302-the-giant-arcs-that-may-dwarf-everything-in-the-cosmos" rel="nofollow">https://www.bbc.co.uk/future/article/20230302-the-giant-arcs...</a> dated March 2023. Today’s article is triggered by a presentation of results but contains less information.
How do we measure the distance to those galaxies to be sure that it’s really a ring, rather than something that looks like a ring from our perspective? I know that supernovas provide one technique for distance measurement, but it feels unlikely that we’ve done that for every galaxy in this structure?
And <i>Is the Observable Universe Consistent with the Cosmological Principle?</i><p>- Classical and Quantum Gravity 40(9) (April 2023)<p><a href="https://iopscience.iop.org/article/10.1088/1361-6382/acbefc" rel="nofollow">https://iopscience.iop.org/article/10.1088/1361-6382/acbefc</a>