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Talk:Black hole

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discussed in my blog and published in the Philosophical Transactions of the Royal Society as "On the means of discovering the distance, magnitude, &c. of the fixed stars, in consequence of the diminution of the velocity of their light, in case such a diminution should be found to take place in any of them, and such other data should be procured from observations, as would be farther necessary for that purpose. By the Rev. John Michell, B.D. F.R.S. In a letter to Henry Cavendish, Esq. F.R.S. and A.S"
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I have sought other potential sources where Michell may have used this phrase - it does not appear in any documents identified in the Royal Society archive or in Michell's correspondence with Cavendish associated with the final letter that was published in the Philosophical Transactions in 1783. The
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My mistake regarding the citation for the first statement which I incorrectly identified as being my blog post. However i still believe that the statement "Michell referred to these bodies as dark stars " is not backed up by a correct citation. Having reread the article by Simon Schaffer given as
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Scholars of the time were initially excited by the proposal that giant but invisible 'dark stars' might be hiding in plain view, but enthusiasm dampened when the wavelike nature of light became apparent in the early nineteenth century, as if light were a wave rather than a particle, it was unclear
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which is referenced by Simon Schaffer, in turn refers to letters between Cavendish and Michell at Chatsworth Archive who hold Henry Cavendish's papers. I have enquired with their archivist who has checked all 11 letters between Michell and Cavendish in their collection , none use the term "dark
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Hi, I'd like to repeat my request that the following statement be removed "John Michell used the term "dark star" in a November 1783 letter to Henry Cavendish" the citation is to a blog post I wrote where this claim is not made. Nor does the term appear in the referenced letter by Michell to
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Please remove the second statement I identified, in the etymology section: "John Michell used the term "dark star" in a November 1783 letter to Henry Cavendish" or remove/replace citation referring to my blog post. The term "dark star" does not appear in Michell's letter to Henry Cavendish
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Please remove this statement: "Michell referred to these bodies as dark stars.". The source given is a blog article on the Royal Society website. I am the author of the blog and wish to have this statement removed as Michell does not explicitly use the term 'dark star'. 'Dark stars is a
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Cavendish published in the Royal Society transactions. Please see my additional comments above about research into possible other sources I investigated. If the statement is not removed please remove the citation to my blog post and cite an alternative to back this up.
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This statement has me scratching my head a little, because light moves at the same velocity regardless. It seems like it should be the (externally-viewed) emission of the light that is slowed (and red shifted) by time dilation.
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For the same reason remove from the etymology section this statement: "John Michell used the term "dark star" in a November 1783 letter to Henry Cavendish," again the source given is my blog post.
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Light from the collapsing material takes longer and longer to reach the observer, with the light emitted just before the event horizon forms delayed an infinite amount of time.
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Please remove it or correct it. Thank you. (I suspect that the word "and" is missing after "on", but I do not have the necessary physical expertise and no source is provided.)
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citation at he does not credit John Michell with using the phrase 'dark star' either. Schaffer's article can be accessed free online here if you wish to confirm this:
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Replace the dashes for commas. Introduce John Michell and Pierre Simon in the beginning of the second paragraph. Meaning put the subjects who discovered it first.
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This seems pretty clear to me, if not intentionally flowery and pretentious, ie. 'enthusiasm dampened'. Someone wanted to sound like Shakespeare.
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I made a small grammatical change to the sentence that might help to improve the clarity- others can check and see if you agree with the change.
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Failed to parse (SVG (MathML can be enabled via browser plugin): Invalid response ("Math extension cannot connect to Restbase.") from server "
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I think the article pretty clearly states that the radiation is emitted outside the event horizon. What would you suggest make that clearer?
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Write on the main table: smallest observed so-and-so, smallest theorized so-and-so // biggest observed so-and-so, biggest theorized so-and-so
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Instead, spacetime itself is curved such that the geodesic light travels on never leaves the surface of the "star" (black hole).
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Hi and thank you for clarifying. I would like to apologize for my original response and will look into this shortly.
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Since the statement doesn't seem to be a huge issue like in BLPs I'm going to place a template and call it a day.
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Added references to newly revised sections/ identify statements that need referencing. (i.e. add {{fact}} tags.)
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That error appears in the Gravitational Collapse section. I don't know what it means or how to fix it.
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Also noteworthy, CERN claims to have created matter '30 to 50 times as dense as an ordinary nucleus':
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paraphrasing used in my blog not a direct quote from the article by Michell discussed in the blog.
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on Knowledge. If you would like to participate, please visit the project page, where you can join
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Create a non-technical introduction to black holes, either as a new section or separate article (
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The article has no discussion on the interior of a black hole, for which numerous sources exist.
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Cramer, Claes R. (1997). "Using the Uncharged Kerr Black Hole as a Gravitational Mirror".
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star". This can be verified by consulting the published correspondence of Henry Cavendish
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are hypothetical point particles, conceived of as sub-components of quarks and leptons).
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Write both observed AND theorized (if you hide theory vs data science doesn't evolve).
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https://news.osu.edu/black-hole-is-closest-to-earth-among-the-smallest-ever-discovered/
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I hope that someone knowledgeable about the subject can rewrite this, but in English.
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https://books.google.co.uk/books/about/Cavendish.html?id=XpyvPTRwLoQC&redir_esc=y
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The sentence is correct as written: the geodesic itself never leaves the surface. -
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I removed it since it failed verification. Feel free to restore if you disagree.
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Pages within the scope of WikiProject Astronomical objects (WP Astronomy Banner)
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theories, even though the article does mention the surely even more speculative
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Littered with the assumption of singularity, the article needs a major rewrite.
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This article has been viewed enough times in a single week to appear in the
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John Michell and Henry Cavendish: Weighing the Stars' by Russell McCormmach
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Hawking radiation is mentioned to escape despite it saying nothing escaped
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The section on "Formation and evolution" contains the following sentence:
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Thank you, I appreciate you taking the time to investigate my request.
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Does light slow down or is it the emission of light that is slowed?
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https://home.cern/science/physics/heavy-ions-and-quark-gluon-plasma
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what, if any, influence gravity would have on escaping light waves.
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I saw the same thing, but it seems to have fixed itself now.
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of this article to be created. For further information, see
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for general discussion about black holes. Any such comments
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Featured articles that have appeared on the main page once
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