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Which direction should I look to watch BIG BANG?

kiratgurung

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kiratgurung

kiratgurung

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Hi guys,

New guy here (totally new for everything:- telescope, cosmology, optics, everything. Just starting to study about these things. And joined this site a week earlier.)...

And here's my first question. Please don't laugh! :headbang:

# 1. Let's say, I have a telescope which is capable of seeing 14 billion light years in time. And let's assume our universe is not expanding/stretching. so, which direction should I point my telescope to see the Big Bang??? Also assume that my telescope can see through those plasma walls... :) (remove all the obstacles).

#2. Let's say I saw the BIG BANG... ;) and still keep on observing... Will I be able to see my self ??? I know I won't live trillions of years... But just a curious question.... :(

:(

These cosmology is making me go nuts... hehe... so interesting... :D

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johnrt

johnrt

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1. Any direction you like, it happened everywhere all at the same time.

2. Were you at the big bang? If so then Yes!

# 1. Let's say, I have a telescope which is capable of seeing 14 billion light years in time. And let's assume our universe is not expanding/stretching. so, which direction should I point my telescope to see the Big Bang??? Also assume that my telescope can see through those plasma walls... :headbang: (remove all the obstacles).

#2. Let's say I saw the BIG BANG... :) and still keep on observing... Will I be able to see my self ??? I know I won't live trillions of years... But just a curious question.... ;)

:D

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Gomtuu

Gomtuu

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That always confused me. If we can measure the velocity of celestial objects in the expansion of the universe, why can't we extrapolate backwards to where they all started and say "it was over there"? :D

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GazK

GazK

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That always confused me. If we can measure the velocity of celestial objects in the expansion of the universe, why can't we extrapolate backwards to where they all started and say "it was over there"? :D

Because everything is moving away from everything else. Space itself is expanding. Try an analogy: if I take a deflated balloon and put dots all over it with a sharpy pen, then blow it up, can you point to where the balloon "started"? No.

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Gomtuu

Gomtuu

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if I take a deflated balloon and put dots all over it with a sharpy pen, then blow it up, can you point to where the balloon "started"?

Apologies, I should have said that it used to confuse me. The balloon analogy is the way it was originally explained to me.

To my way of thinking, my original problem was that I was thinking of the universe as being a simple three-dimensional space, which of course it isn't.

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shellfish

shellfish

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EASY..... I was talking to my Grandpa at the weekend (and he is that old!!!!) and he said from where he was sitting at the time It was just off to the left a little....

Couldn't be simpler :D

Hope that helps :headbang:

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themos

themos

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The terms "big bang" and "expansion of the universe" were almost tailor-made to confuse people.

The big bang wasn't a bang and it wasn't big, it's just a mathematical extrapolation from current observations.

And the universe is not expanding, it's inflating.

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ollypenrice

ollypenrice

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The terms "big bang" and "expansion of the universe" were almost tailor-made to confuse people.

The big bang wasn't a bang and it wasn't big...QUOTE]

:D Indeed, and since the phrase, coined by a sceptical Fred Hoyle, was intended to be satyrical, he would be delighted to hear you say so!!

I do like your replacement of expansion with inflation of the economic kind. It deserves a wide audience. The trouble is, we are stuck with metaphor both at the Cosmological scale and at the Quantum. Very frustrating but better than nothing. I wonder what kind of selection pressure might arise to allow us to develop an intelligence capable of directly grasping concepts outside three spacial dimensions and time. Indeed, I wonder if it has evolved somewhere else? There's a thought.

Olly

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ollypenrice

ollypenrice

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tell the the direction guys!

That's easy. Any direction and/or every direction. The furthest back we can see is to the last scattering surface which is where the light from the Cosmic Microwave Background came from. It is almost uniformly distributed (surprisingly so) around the entire sky. Into the primordial plasma we cannot see because plasma is not transparent to light but, even if it were, the answer would not change. What is difficult to swallow is that a tiny point can be 'everywhere' but that is what the BB says. 'Everywhere' was once very seriously small. This point has already been made earlier on, if I remember.

Here's a pic. http://www.google.fr/imgres?hl=en&sa=X&biw=925&bih=460&tbm=isch&prmd=imvns&tbnid=ry2d_uqfL9P2nM:&imgrefurl=http://cosmology.berkeley.edu/Education/CosmologyEssays/The_Cosmic_Microwave_Background.html&docid=-GWexB9Sf8QHNM&imgurl=http://cosmology.berkeley.edu/Education/CosmologyEssays/images/WMAP_skymap.jpg&w=640&h=320&ei=7JhYT6qqOca_0QXu66TJDQ&zoom=1&iact=hc&vpx=339&vpy=57&dur=2566&hovh=159&hovw=318&tx=170&ty=96&sig=113746124454039428597&page=1&tbnh=72&tbnw=143&start=0&ndsp=10&ved=1t:429,r:2,s:0

If you turn on a detuned telly some of the noise is from the CMB. The BB live on TV!

Olly

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