timmdeeg's latest activity
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Ttimmdeeg replied to the thread I Is there anything inside a black hole?.Compared to the duration of a far away supernova.
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Ttimmdeeg reacted to javisot's post in the thread I Is there anything inside a black hole? with
Like.
What martinbn is trying to point out is that locally, time passes at the same rate at any point in the universe, even near an event... -
TIt's worth noting that this is an over simplification, one which contributes to the confusion around black holes (IMO) by providing a...
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Ttimmdeeg reacted to PeterDonis's post in the thread A Strong Progenitor Age Bias in Supernova Cosmology with Like.
That shouldn't be possible with a cosmological constant, because the energy density of matter and radiation can only decrease with...
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Ttimmdeeg reacted to Ibix's post in the thread A Strong Progenitor Age Bias in Supernova Cosmology with Like.
Yes. Figure 9 in the paper in the OP shows the acceleration parameter, ##-\ddot{a}a/\dot{a}^2##, as a function of time under several...
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Ttimmdeeg replied to the thread A Strong Progenitor Age Bias in Supernova Cosmology.And another point, wouldn't this result change the expansion history significantly? The temperature of the plasma at recombination is...
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Ttimmdeeg replied to the thread A Strong Progenitor Age Bias in Supernova Cosmology.Very interesting! How would this conclusion fit to the (almost) flatness of the universe?
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Ttimmdeeg replied to the thread B Is space stretching or is new space being created?.Perhaps this helps: https://www.astro.ucla.edu/~wright/cosmology_faq.html#MX Are galaxies really moving away from us or is space just...
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Ttimmdeeg replied to the thread B Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".Thanks, to me its hard to see though how 1) and 2) result in a dark matter halo without visible matter.
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Ttimmdeeg replied to the thread B Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".... around the bulge, yes. From here we start. The Bullet Cluster shows that even after collisions of Galaxies dark matter is still...
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Ttimmdeeg replied to the thread B Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".The main mass of a galaxy is located in its bulge. In this case separation is hard to imagine, isn't it?
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Ttimmdeeg replied to the thread B Rutgers finds a transparent Einstein Cross - apparently a dark matter "halo".As I understand it, many observations show that dark matter is gravitationally bound to visible matter. Supposed this dark matter halo...
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Ttimmdeeg reacted to Andy Resnick's post in the thread Our Beautiful Universe - Photos and Videos with Like.
Tonight: Rabbit in the moon
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Ttimmdeeg reacted to collinsmark's post in the thread Our Beautiful Universe - Photos and Videos with Like.
The Jellyfish Nebula (a.k.a. IC 443, Sh 2-248) scooped up from my back patio, Feb. - Mar. 2025. The nebula is a supernova remnant found...
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Ttimmdeeg reacted to PeterDonis's post in the thread I I don't see how a black hole's event horizon can be crossed with Like.
No, that's not the two spacetimes. Both of the things you describe are true in the same spacetime--the "eternal" black hole spacetime...