Hubble XDF update
Discussion
Just read that Nasa has added a further 5500 galaxies to the hubble XDF image full story here http://www.guardian.co.uk/science/2012/sep/26/hubb...
I don't know about you but I can hardly get my head round it, everytime I think there is no way that the Universe can be bigger something like this comes out and its only a small portion of the sky!
ETA: the full image can be viewed here http://www.nasa.gov/images/content/690958main_p123...
I don't know about you but I can hardly get my head round it, everytime I think there is no way that the Universe can be bigger something like this comes out and its only a small portion of the sky!
ETA: the full image can be viewed here http://www.nasa.gov/images/content/690958main_p123...
http://www.bbc.co.uk/news/science-environment-1972...
"Moon for scale" That's not right surely!! The moon would be miniscule???
"Moon for scale" That's not right surely!! The moon would be miniscule???
My brain 'urts and thus I must be dumb...
I read the BBC article where they believe they have 'pictured' the newest (found) galaxy at around 600m years old, presumably this is worked out by them calculating that the light has taken 13.1bn years to get to us - assuming the universe is 13.7bn years old - I get this, I think.
They look forward to hubble2 whereby they'll be able to see even younger galaxies, and on it goes until eventually we will have an image of a galaxy that has just been created moments after the bigbang.
Presumably, we will be able to achieve this as these objects are constant light (wavelength) emitters/reflectors and always have been up to that point - 13.7bn years and 1 day.
However, I seem to remember that if we continue to improve our telescope technology we will witness the bigbang; how, if it was an event which was fleeting, not constant, happened 13.7bn years ago and we're seemingly 13.7bn years from it (but we're not on the edge of the known universe)...
So what will we see? A flash?
In what direction? Or from every direction but at different distances?
...and finally, what will the telescope see beyond 13.7bn light years?
As I said my brain hurts, I thought I had it, then lost it as I typed this out on a mobile phone.
Help.
Eta - is the age of the universe relative to where you are in it?
I'll stop now
I read the BBC article where they believe they have 'pictured' the newest (found) galaxy at around 600m years old, presumably this is worked out by them calculating that the light has taken 13.1bn years to get to us - assuming the universe is 13.7bn years old - I get this, I think.
They look forward to hubble2 whereby they'll be able to see even younger galaxies, and on it goes until eventually we will have an image of a galaxy that has just been created moments after the bigbang.
Presumably, we will be able to achieve this as these objects are constant light (wavelength) emitters/reflectors and always have been up to that point - 13.7bn years and 1 day.
However, I seem to remember that if we continue to improve our telescope technology we will witness the bigbang; how, if it was an event which was fleeting, not constant, happened 13.7bn years ago and we're seemingly 13.7bn years from it (but we're not on the edge of the known universe)...
So what will we see? A flash?
In what direction? Or from every direction but at different distances?
...and finally, what will the telescope see beyond 13.7bn light years?
As I said my brain hurts, I thought I had it, then lost it as I typed this out on a mobile phone.
Help.
Eta - is the age of the universe relative to where you are in it?
I'll stop now
mrloudly said:
http://www.bbc.co.uk/news/science-environment-1972...
"Moon for scale" That's not right surely!! The moon would be miniscule???
Yes, but no!"Moon for scale" That's not right surely!! The moon would be miniscule???
I think they are refering to scale in the nightsky, as viewed from Earth - ie if you look up the moon is yay wide, while the area scaned is a lot smaller.
In a Father Dougal kind of way.
DonnyMac said:
My brain 'urts and thus I must be dumb...
I read the BBC article where they believe they have 'pictured' the newest (found) galaxy at around 600m years old, presumably this is worked out by them calculating that the light has taken 13.1bn years to get to us - assuming the universe is 13.7bn years old - I get this, I think.
They look forward to hubble2 whereby they'll be able to see even younger galaxies, and on it goes until eventually we will have an image of a galaxy that has just been created moments after the bigbang.
Presumably, we will be able to achieve this as these objects are constant light (wavelength) emitters/reflectors and always have been up to that point - 13.7bn years and 1 day.
However, I seem to remember that if we continue to improve our telescope technology we will witness the bigbang; how, if it was an event which was fleeting, not constant, happened 13.7bn years ago and we're seemingly 13.7bn years from it (but we're not on the edge of the known universe)...
So what will we see? A flash?
In what direction? Or from every direction but at different distances?
...and finally, what will the telescope see beyond 13.7bn light years?
As I said my brain hurts, I thought I had it, then lost it as I typed this out on a mobile phone.
Help.
Eta - is the age of the universe relative to where you are in it?
I'll stop now
I thought we (Earth) was only 4 billion years old, so ther's a good few billion light years of stuff ahead of our expansion and 4 billion light years worth behind it?I read the BBC article where they believe they have 'pictured' the newest (found) galaxy at around 600m years old, presumably this is worked out by them calculating that the light has taken 13.1bn years to get to us - assuming the universe is 13.7bn years old - I get this, I think.
They look forward to hubble2 whereby they'll be able to see even younger galaxies, and on it goes until eventually we will have an image of a galaxy that has just been created moments after the bigbang.
Presumably, we will be able to achieve this as these objects are constant light (wavelength) emitters/reflectors and always have been up to that point - 13.7bn years and 1 day.
However, I seem to remember that if we continue to improve our telescope technology we will witness the bigbang; how, if it was an event which was fleeting, not constant, happened 13.7bn years ago and we're seemingly 13.7bn years from it (but we're not on the edge of the known universe)...
So what will we see? A flash?
In what direction? Or from every direction but at different distances?
...and finally, what will the telescope see beyond 13.7bn light years?
As I said my brain hurts, I thought I had it, then lost it as I typed this out on a mobile phone.
Help.
Eta - is the age of the universe relative to where you are in it?
I'll stop now
It never want bang. Bang is the wrong word to use. It just began expanding from a singularity at a fixed point in the past - and has continued to do so ever since.
And it's not expanding into anything - at least nothing that we could understand in out three/four dimensional appreciation of space and time.
And it's not expanding into anything - at least nothing that we could understand in out three/four dimensional appreciation of space and time.
Eric Mc said:
It never want bang. Bang is the wrong word to use. It just began expanding from a singularity at a fixed point in the past - and has continued to do so ever since.
And it's not expanding into anything - at least nothing that we could understand in out three/four dimensional appreciation of space and time.
"It just began expanding" What's "it"? and what did "it" expand into from where LOL We can't really explain and that's what the human mind hates, everything mustAnd it's not expanding into anything - at least nothing that we could understand in out three/four dimensional appreciation of space and time.
be "put to bed" but in this case we can't.
Even the best brains in the world can't really visualise such events. Indeed, "visualising" requires you to paint a mental picture using the normal dimensions we deal with on a day to day basis - which means that the mere effort of trying to viualise something that probably didn't and/or isn't just happening in the dimensions we CAN visualise is almost a waste of effort.
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