Path: csiph.com!optima2.xanadu-bbs.net!xanadu-bbs.net!nntp.club.cc.cmu.edu!micro-heart-of-gold.mit.edu!newsswitch.lcs.mit.edu!nntp.TheWorld.com!.POSTED!not-for-mail From: moroney@world.std.spaamtrap.com (Michael Moroney) Newsgroups: sci.physics Subject: Re: Gravity/eXergy ( energy that can do work ) is dying off. Date: Mon, 4 Apr 2016 23:29:17 +0000 (UTC) Organization: The World : www.TheWorld.com : Since 1989 Lines: 25 Message-ID: References: <95c982a0-9762-4457-8cd4-81dbc0191bac@googlegroups.com> <44d3ae63-70d0-49ec-a43a-982f427f3014@googlegroups.com> <84f2369d-9b63-4256-8d24-87e9182c5f7f@googlegroups.com> NNTP-Posting-Host: shell01.theworld.com X-Trace: pcls7.std.com 1459812557 13778 192.74.137.71 (4 Apr 2016 23:29:17 GMT) X-Complaints-To: abuse@TheWorld.com NNTP-Posting-Date: Mon, 4 Apr 2016 23:29:17 +0000 (UTC) User-Agent: nn/6.6.5 Xref: csiph.com sci.physics:567962 Jeff-Relf.Me <@.> writes: >Gravity/eXergy ( energy that can do work ) is dying off. >Eventually, the cosmos will have (near) zero density/gravity/eXergy. >"Dark Energy" is entropy. "Dark Matter" is unseen mass. You're just making up crap. The gravitational potential energy I mentioned will exist in the gravitational fields between the galaxy clusters. The process of converting kinetic energy (or dark energy) to gravitational potential energy likely does increase entropy. But the gravitational energy remains until extracted somehow, and that would mean the star clusters move to a lower gravitational state. It may be that this energy may never be extractable/convertable, an infinitely expanding universe. This energy would exist for all time, barring something that causes the universe to collapse. If the universe expands forever, its density does decrease on average. The gravitational potential energy will asymptopically approach a certain value, related to the original escape velocity from each other. Entropy will continue to increase, or at least never decrease. We don't know what dark energy is yet. We just know that it seems that "something" is accelerating the expansion of the universe. We certainly know that gravity is not getting weaker.