Space Blob baffles scientists

Surely if there was an explosion from the big bang that would give us light instantaneously though?

For initial period right after the big bag the universe was too dense for light to travel through it. Therefore there is no light from this period. The very earliest light waves have become stretched out over time and are now the background radio waves you can see hear on an untuned TV or Radio.

That's my current understanding of things anyway based on my somewhat limited knowledge gained from obsessive watching of discovery/history channel etc and the few astro physics book I've read. Hopefully someone more knowledgable will be able to explain it a bit better.
 
This stuff is so amazing, but can baffle the mind so much! Like above... what exactly is going on over there now that it's 12.9 billion years on from what we are seeing!
 
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