tag:blogger.com,1999:blog-5880610.post4655468591603404284..comments2024-01-13T18:57:18.243-05:00Comments on Information Processing: Astrophysical Repulsion from Dark EnergySteve Hsuhttp://www.blogger.com/profile/02428333897272913660noreply@blogger.comBlogger2125tag:blogger.com,1999:blog-5880610.post-71467133147929367952015-01-27T21:25:11.454-05:002015-01-27T21:25:11.454-05:00Right.... in Newtonian cosmology. For example, you...Right.... in Newtonian cosmology. For example, you say: "For example, the dark force overcomes the gravitational attraction from an object (e.g., dwarf galaxy) of mass $10^7 M_\odot$ at a distance of $~ 23$ kpc. "<br />So what you are saying is that, at 23 kpc, there is an outward force *vector* which cancels the inward force *vector*. That is perfectly sensible in Newtonian cosmology, Rastus Odinga-Odinganoreply@blogger.comtag:blogger.com,1999:blog-5880610.post-53522438979418654972015-01-27T02:41:36.116-05:002015-01-27T02:41:36.116-05:00I'm afraid I don't get it. The dark energy...I'm afraid I don't get it. The dark energy [if it is due to a cosmological constant] is perfectly isotropic, it cannot exert a "force" in any direction. People sometimes informally picture it as a repulsive "force" that "forces" the universe to accelerate, but that is not correct; any three-vector in an isotropic system clearly has to be zero everywhere; one Rastus Odinga-Odinganoreply@blogger.com