Talk:1 E19 s and more
From Academic Kids
Confused: At 10^64 and 10^100 years we have black holes decaying by the Hawking process, but at (10^10^26) years we have matter collapsing into black holes again. Wouldn't these black holes again decay? Once and for all -- is the end state of the universe one big black hole (all the black holes merge) or uniform low-energy photons (Heat death of the universe)?
How about naming this page 1 E19 s and beyond?
The table is for durations of time, not specific points in time. So beyond may be misleading, I don't know... Whatever happens in terms of renaming, ALL references must be similarily updated to avoid double redirects... Egil 11:25 Apr 1, 2003 (UTC)
Also, although here pretty clear, in general beyond might be ambiguous because it depends on direction: it can mean more or less (what means 1 sec and beyond?). - Patrick 11:51 Apr 1, 2003 (UTC)
About black holes decaying due to Hawking radiation: an article on astronomy in a (german) copy of Scientific American I own, written by Lawrence M. Krauss and Glenn D. Starkmann (both from Case Western Reserve University in Cleveland), states that this is only due to happen at ~1098 years, not 1064. Does anyone have references that would support either estimate? -- Schnee 01:14, 5 Aug 2003 (UTC)
Not sure where the figure 10^10^26 for decay to iron comes from. I believe the correct value is the far more modest 10^1500. Will change if no one has a credible source for the larger value. (Also, I hadn't seen the 10^10^76, but I think black hole talk is still mostly speculation.) Mentioning this is contingent on no proton decay might be important too. -- VV 09:49, 6 Oct 2003 (UTC)
If I remember correctly, (10^10)^76 is the time in which a supermassive black hole evaporates in Hawking radiation, i.e. after that time there is no material left in the universe.
Be careful with powers of powers, (10^10)^76 = 10^760 and not 10^(10^76).
Ahh, stupid error :( Shouldn't edit tired... Jyril 17:00, 18 Jun 2004 (UTC)
What does "time until positrons and electrons form positronium" mean? Positronium decays with a half-life about 10^-7 seconds.
- I agree it doesn't make sense. Removed. _R_ 14:12, 12 Aug 2004 (UTC)
Finite time
Has it been proven (not just believed by a vast majority of scientists, but PROVEN that the entire time the universe will be before it ceases to exist is finite?? 66.245.23.71 00:32, 12 Nov 2004 (UTC)
