Looking back to the Big Bang

[rov1100]

How is it possible to train our telescopes back to the start of the universe and the Big Bang? This happened about 13billion years ago I believe.

During the whole of that time galaxies formed that over time that would obliterate from view what we could see.

A simple analogy would be the the moon blocking out the Sun but if their were many millions of moons the sun would be blocked out completely and as we know time always moves forward and the situation couldn't be reversed.

[jomifl]

Could you re-phrase that please?

[Tom Braider]

The problem isn't how we can see light from the early universe but why we don't see a uniformly bright sky. It's called Obler's paradox - but there is an explanation... http://en.wikipedia.org/wiki/Olbers'_paradox

[mrsmbird]

They are not looking back to the big bang, they are detecting the observable evidence that is all around us.

Cosmologists are able to measure light and background background radiation from the big bang that has taken 13.6 billion years to reach earth. They can do this by looking for redshift - changes to the wavelenght of light that can be used to calculate it's age - and also cosmic background radiation (CBR). CBR is basically radiation left over from the elementary soup of the early universe.

Wikipedia explains it well: http://en.wikipedia.o...bservational_evidence

[rov1100]

Tom Braider that video in Oblers paradox exactly explains what I meant when the main object is obliterated by its surroundings. Thanks for that info!

[askyourgran]

Interesting but complicated.

[scowie]

According to the Big Bang Theory the light from the hot dense early universe has been redshifted into the microwave region of the spectrum by expanding space. The cosmic microwave background is alledged to be this light.

But since I dont believe in the Big Bang/expanding space, imo the CMB is simply the blackbody radiation emitted by matter in interstellar space...
http://www.metaresear...smology/BB-top-30.asp

[Old_Geezer]

If something that seems to be a paradox has been explained, then is it a paradox after all ? Was it ever ?