Jun 19, 2017 11:52
6 yrs ago
English term
dark hole
English
Science
Physics
Hi,
I was wondering whether “dark holes” in the following passage is the same as "black holes" or whether there is any difference... The passage is taken from a book for non-specialists.
Thank you in advance for any hint!
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At this macroscopic level, for example, we are learning that much of the universe is comprised of dark matter and dark energy—mass and forces that we cannot directly detect with our eyes or our instruments, though the shadows of their effects, such as ** dark holes **, can be deduced and their existence all around us ascertained. These are the many powerful yet often-invisible ways energy manifests itself.
I was wondering whether “dark holes” in the following passage is the same as "black holes" or whether there is any difference... The passage is taken from a book for non-specialists.
Thank you in advance for any hint!
********************************
At this macroscopic level, for example, we are learning that much of the universe is comprised of dark matter and dark energy—mass and forces that we cannot directly detect with our eyes or our instruments, though the shadows of their effects, such as ** dark holes **, can be deduced and their existence all around us ascertained. These are the many powerful yet often-invisible ways energy manifests itself.
Responses
4 +6 | black hole | M.A.B. |
Responses
+6
2 hrs
Selected
black hole
As explained in the discussion.
Also - "trust me, I'm an astrophysicist".
Also - "trust me, I'm an astrophysicist".
Note from asker:
Thank you so much, M.A.B.! Maybe, as you said in the Discussion, the author has used "dark hole" to put "black holes" in the par with "dark energy" and "dark matter"... so maybe I can write a Translator's Note to point out this aspect... |
Peer comment(s):
agree |
Charles Davis
1 hr
|
Thanks.
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agree |
Herbmione Granger
: There are enough weird things in this text without 'dark holes'. 'Trust me, I'm a scientist' doesn't usually work here, by the way. I've tried :)
3 hrs
|
Yes, sure, I don't know what was on author's mind; my point is that this term isn't used in science.
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agree |
Yvonne Gallagher
: not part of my skillset but very convincing argument
20 hrs
|
Thank you.
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agree |
Jörgen Slet
23 hrs
|
Thanx.
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agree |
Yasutomo Kanazawa
1 day 26 mins
|
Thank you.
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agree |
acetran
1 day 17 hrs
|
Thank you.
|
4 KudoZ points awarded for this answer.
Comment: "Thank you so much for your valuable help!
A sincere thanks also to all other participants!"
Discussion
have a nice evening!
You're all pulling me out, well, of a "black hole"!! (it's a really interesting theme, though and I'm glad I've asked: thanks for all the information you've given me!)
Have a nice evening!
Unfortunately this is the only occurrence of "dark holes" in the book... Perhaps I should have said that this is a book on "mind", more a psychology book than a physics book, although it often refers to physics (e.g. quantum theory, thermodynamics etc.)
I guess (or - I should say - I hope) the author is treating this theme as generally as possible for a large audience, so if "black hole" makes sense in the passage - as it seems it does - maybe I can use it...
But I've just looked "Hawking" up in the References section of the book, and the author has actually included one of Hawking's text..so it may also be Charles's option 2 (maybe the author has read the book and has recalled this term... ). I tried the Google books search for this Hawking's book, but it doesn't seem to contain the term "dark hole"--it's a very old book, though
Maybe I could write a Translator's note, saying that the author has used "dark holes", a term which may refer in general to “black holes” or to Hawking's theory that "black holes" may be not so black after all!!
I can only suspect that the author of the Asker's text used this term on purpose to put black holes on par with dark matter and dark energy. In translation one could still use dark holes in the target language, I agree, but I'd then add quotes.
One can of course come up with physical theories where a black hole made of dark matter would be different from a black hole made of ordinary (non-dark) matter, but it's beyond the standard physics where "black holes have no hair".
https://en.wikipedia.org/wiki/No-hair_theorem
1. The writer is using "dark hole" carelessly and improperly as a synonym for "black hole". Other examples of this can be found on the Internet.
2. The writer is referring to black holes but is calling them "dark" as an allusion to Stephen Hawking's argument that black holes are not completely "black" (in other words, that particles can escape from a black hole).
3. The writer is not referring to black holes at all but to intergalactic voids, as in the following Royal Astronomical Society news report:
"We live in a universe dominated by unseen matter, and on the largest scales, galaxies and everything they contain are concentrated into filaments that stretch around the edge of enormous voids. Thought to be almost empty until now, a group of astronomers based in Austria, Germany and the United States now believe these dark holes could contain as much as 20% of the 'normal' matter in the cosmos [...]
The culprit appears to be the supermassive black holes found in the centres of galaxies. [...]"
https://www.ras.org.uk/news-and-press/news-archive/264-news-...
I'm not sure, but I suspect it's (1).
Actually I've found an occurrence in which the two terms are treated as if they had the same meaning (provided I've understood the text correctly..).
Maybe you can post your reply, so that I can give you points...
http://adsabs.harvard.edu/abs/2012APS..APR.K1079C
The model of dark matter such as dark hole (black hole), dark comet and dark light have the space-time center. The wave is the space-time. Because the dark matter is space-time center, so it has the ``negative'' mass.
On the other hand, formally black holes should be treated as dark matter as they don't emit radiation. So maybe this is what the author meant: black holes, regarded as dark matter. But normally we don't say "dark holes".