Beyond wrote:It looks like you and BDanielMayfield have about a 20 Billion light year difference of opinion. The video was less than a minute.Ksdogra wrote:Actually the flight was very fast. About ten billion ly/minute!Beyond wrote:I'm glad the flight didn't go very fast. After all the marshmallow and popcorn from yesterday's APOD, i didn't feel like going to fast.
After we got by everything at the end, what's that tiny red dot in the middle of the screen
Thank you bystander and thank you Dr. Summers.bystander wrote:Beyond wrote:I'm glad the flight didn't go very fast.BDanielMayfield wrote:Didn't go very fast??? Our virtual starship covered over 30 billion light years in 58 seconds!
Ksdogra wrote:Actually the flight was very fast. About ten billion ly/minute!
Dr. Frank Summers from STScI, one of the creator's of the video, commented on facebook:
The speed of the camera through the data set is roughly 200 million light-years per second.
So some universal accounting is in order, to reconcile these numbers.
My mistake was to assume that the simulated flight begins here. The simulation doesn’t begin here; it starts at the near edge of the Hubble Ultra Deep Field. Where was that? From the duration x speed we have 58 sec. x 200,000,000 ly/sec. = 11.6 billion light-years.
I came up with 30 billion light-years from this given:
So how far out is a redshift past 8? Using the handy dandy Redshift Lookup Table for the Universe that was the APOD for April 8, 2013 I find that the observable radius out to a redshift or “z” of 8 is about 9150 Mpc. Mpc is short for 1 million parsecs, and 1 parsec = 3.26 light-years, therefore 9150 x 1,000,000 pc x 3.26 ly/pc = 29.829 billion lys. So “past 8” would be about 30 billion lys. 30 – 11.6 = 18.4, therefore today’s APOD trip started about 18.4 billion lys out and ends about 30 billion lys out.APOD Robot wrote:Toward the end of the video the virtual observer flies past the furthest galaxies in the HUDF field, recorded to have a redshift past 8.
Incidentally, a speed of 200 million light-years/sec. is, err, 200 Million times the speed of light of course. (Self edit: WRONG you Dummy! See Mizar's comment below.) That's flat out fast to me, but I haven't been on the ship that long. To an experienced crewmember like Beyond it evidently seems like a leisurely cruising speed.
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