Re:A new Einstein cross is discovered
by monkeydreams on Monday March 25, 2019 @10:43PM
(#19488859)
> Belated edit: More like ~10^81 times the speed of light.
I have no grounding in physics on which to place this hunch but... doesn't this sound like a wee fudge factor to make the Big Bang theory fit evidence?
I am reminded of the concept of "aether" and "land bridge theory" where people had a workable hypothesis except for the niggly little problem that the hypothesis was contraindicated by some of the evidence.
I wonder about that too.
So the universe is expanding at greater than 10^90 m/s now, since the expansion is accelerating?
Re:A new Einstein cross is discovered
by improbable22 on Monday March 25, 2019 @05:22PM
(#19486858)
No, "inflation" refers to a specific episode in the very early history of the universe. Or rather, in some models of this.
Much slower expansion continued and continues today, and if you look really carefully is slightly accelerating not decelerating right now.
m/s, or comparing to the speed of light, isn't really a great way to measure this. Points far away from us are moving away, and faster the further you go; we know of no limits to this.
> According to the theory of inflation, the Universe grew by a factor of 10 to the sixtieth power in less than 10 to the negative thirty seconds, so the "edges" of the Universe were expanding away from each other faster than the speed of light [0]
It seems that the universe was on the order of ~1 meter in diameter then.[1] So the "'edges' of the Universe were expanding away from each other" at ~10^90 meters per second.
0) http://curious.astro.cornell.edu/physics/109-the-universe/co...
1) https://www.forbes.com/sites/startswithabang/2017/03/24/how-...
Edit: Upon reflection, I get that "~1 meter in diameter" makes no sense. Maybe just say that the "edges" were ~1 meter apart.