Posted on 05/05/2015 10:50:45 AM PDT by Red Badger
Now there’s a question to ponder....but definately not if you’re stoned.
...not so sure now. One article (excerpt just below) says the galaxy has a redshift of 7.7. While your NASA link for the gamma-ray burst claims a redshift of 8.2 for the GRB. That of course WOULD make it further than the galaxy.
“NASA’s Spitzer Space Telescope also observed the unique galaxy. The W. M. Keck Observatory was used to obtain a spectroscopic redshift (z=7.7), extending the previous redshift record.”
http://astronomynow.com/2015/05/05/astronomers-set-a-new-galaxy-distance-record/
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“The [gamma-ray] burst occurred at 3:55 a.m. EDT on April 23rd. Swift quickly pinpointed the explosion, allowing telescopes on Earth to target the burst before its afterglow faded away. Astronomers working in Chile and the Canary Islands independently measured the explosion’s redshift. It was 8.2, smashing the previous record of 6.7 set by an explosion in September 2008. A redshift of 8.2 corresponds to a distance of 13.035 billion light years.
http://science.nasa.gov/science-news/science-at-nasa/2009/28apr_grbsmash/
According to Wiki, it’s 13.095 LY away................
http://en.wikipedia.org/wiki/List_of_the_most_distant_astronomical_objects#cite_note-Tanvir2009-2
I think about that and it drives me nuts. Too bizarre to know, above all our pay grades.
No edge, according to the astronomers/cosmologists. And there is no *one* center of the universe. Again, according to the pros, EVERYWHERE is the center. No matter where you are in the universe, everything else appears to be expanding away from you. So if the universe has no center, it can have no edge. Makes sense? If it does, please explain it to me!! :)
“If there is a bright center to the universe, you’re on the planet that it’s farthest from” - Luke S.
I don’t think so. That would mean the galaxies were expanding away from each other at 99.99999% of the speed of light just barely keeping ahead of the light until it caught up with us after 13 billion years.
The light we are seeing left that galaxy 13 billion years ago. If the galaxies are all expanding, as they say they are, then it is a lot further than 13 billion light years away right now.
Even one billion is such a big number that we need a useful frame of reference in order to grasp it. The best of which I'm aware is this: our hearts beat one billion times in about thirty years. So I'm at about 2.2 billion beats. Since you asked, thought I'd share.
I don’t know the answer right now. I will look into it some more when my brain is working better. Because I do now recall that it is not as straight forward as it might seem at first.
For example...
3.1 Redshift velocity and recessional velocity
3.1.1 Redshift velocity
3.1.2 Recessional velocity
3.2 Observability of parameters
3.3 Expansion velocity vs relative velocity
3.4 Idealized Hubble’s Law
3.5 Ultimate fate and age of the universe
3.6 Olbers’ paradox
3.7 Dimensionless Hubble parameter
http://en.wikipedia.org/wiki/Hubble%27s_law
No, there’s nothing straightforward about it at all. It’s a real mind bender.
The light from EGS-zs8-1 that we see now has traveled a more or less straight line from where it was 13 billion years ago to where we are now. So when we look at that from here we are seeing its position, from here, 13b years ago.
But EGS-zs8-1 has had 13 billion years to move from that position just as the Milky Way had 13 billion years to move from where it was then to where we are now.
Or so it would seem to me.
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