View Full Version : Birth of the universe
Al-Fredo
03-20-2004, 10:55 AM
Scienctist are constantly talking about how it is now possible to look further into space, and see closer to the beginning - the big bang.
But, logically, if find that hard to believe. Of course when telescopes improve, we will be able to look further into space, but being closer to seeing the instant moment of the big bang?
That would require the light that the scientist are seeing to be the same light emitted from elements around the moment of the big bang. But wouldn't this light be spread out in all directions into the big nothing, if all matter was relativly tightly packed?
Blibblob
03-20-2004, 11:03 AM
Their trying to find the ancient ghost of light. The radiation acually, not the light itself. But the farther you look in space the farther back in "time" you look. The light doesn't move instantaneously, it takes quite some time to get here, so they're trying to find where the light "stops".
Al-Fredo
03-20-2004, 12:14 PM
Perhaps I didn't make myself clear enough. I've attached a drawing showing why it would be imposible to see the light at the time of big bang, unless the universal expansion is faster than the speed of light(which it isn't)
As you can see, the light emitted at the time of big bang is way off into the universe. If we really wanted to see what big bang looked like, we'd have to be in an observation post (age of universe) lightyears away from the point of big bang
http://www.conundrum.dk/bigbang.JPG
Blibblob
03-20-2004, 12:30 PM
We don't know how far away we are from the "center of the universe". Theoretically we could see the light, it supposidly emited in all direction, so some must have come to us. It's been billions of years since the supposed big bang, that light has traveled a long distance. Scientists just have to look in the direction of the center of the universe(which we don't know where it is), and look out really really far. Where the light stops, look I think that's the middle. Some of the light somewhere had to of originated from the begining. I still think what they're going to do is use radiation to see it, not light. And your drawing looks really weird and I can't really see what you're trying to say with it...
Al-Fredo
03-20-2004, 12:46 PM
I'm sorry you don't like my drawing. :) I wanted to illustrate that light emitted from the first seconds of existence would have radiated far into space, so far ahead of us that it would be impossible to see.
But what you're saying makes sense, looking towards the middle of the universe and far far beyond, yes I guess you could see light/radiation from the birth of the universe... even though you'd need some telescope to do it!