Recent content by Greta

Thanks Tim, for acknowledging the question.

The question in post #17 was not asking about broader existence that triggered the big bang. That would be utterly pointless. I am obviously asking about the phenomena that commenced with the BB, not that whih triggered it. The continuing big bang that is commonly called "the universe" is...

The universe? It depends on whether you are referring to 1) the hypothesised quantum foam that preceded the BB or 2) the creation and expansion of spacetime. While experts see the "singularity" as being purely theoretical, it is still well-established that the universe(2) was much smaller than...

Thanks Vanadium. Fascinating info. I don't suppose the math extends to the universe's possible size at after six hours?

Peter, that's a tangential issue. I expect that people around the physics scene would be aware of Lawrence Krauss and his views, paraphrased as: "One can consider measuring time by the number of events that occur within some period. In this sense, more happened in the first second in the...

It's said that the exponential nature of inflation meant that more happened in the first second of the universe than in all the time that has since passed. In context, I am trying to imagine Planck time freeze frames within that first second. An object with the density of neutronium and the...

The temperature in the Earth's lower mantle is about 3000K, and the temps rise towards the core, which I understand is at about 6000C (approx 6270K). Just plodding my way through this conceptually ... while atoms can exist at 6000C under pressure, they cannot form at much cooler temps than that...

TY for the replies. I still do not understand. Today, we observe atoms at temperatures far higher than 3000K that are at far greater densities than 10−15g/cm3. Would someone be able to explain what other factors were in play to prevent atoms from forming during the early universe before...

Hello. Wannabe sci-fi writer here with what may be a simpleton's question. From Google et al: "It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms. These were mainly helium and hydrogen, which are still by far the most abundant elements in the...

Thaks for your reply. So basically the information about atoms' prior spin, location and type is contained within the chaotic information store that is in the BH's event horizon and a more advanced species could theoretically recreate all the things that fell in? So, on a practical basis, the...

I've wondered about this. If an organism fell into a black hole, presuming they didn't burn up en route, I can see how the information regarding the organism's atoms might be preserved. However, wouldn't the information pertaining to the conditioned processes of life be lost, as seems to occur...

Cheers Chronos. Wiki tells me that time dilation on a neutron star is significant, but not profound, the example given being: "eight years could pass on the surface of a neutron star, yet ten years would have passed on Earth, not including the time-dilation effect of their very rapid rotation"...

Thanks Filip. To check my understanding, barring time-sensitive equipment like GPS, time dilation differences in space are only significant as regards the extreme gravity of black holes. Cheers

Upfront: I have no formal training. While the distances of interstellar space are forbiddingly huge, the distances between galaxies would seem to be impassable for any life form, no matter how advanced, barring (very) theoretical traversable wormholes. Aside from radiation and the tyranny of...

@ Phinds. Thanks. I only scanned some of your material, but a search of your domain just returned this earlier forum post by you: So the first law is preserved because the energy driving the universe's expansion is actually already in the universe, just being converted into a different form?