Was the Big Bang really visible on earth?

The 630 million years refers to time after the Big Bang at which point the GRB occurred. The Earth was still about 10 BILLION years away from being formed at that point in time in the young universe.

The Big Bang created time and space. It is true that by looking into the furthest reaches of the universe, we are "looking back in time", but this is not related to how far ago we made the observation. Imagine if the Herschel Space Telescope was around 4 billion years ago. Would it have been able to "see" the big bang?

No - because the universe has been constantly expanding, like a balloon, so that we are further and further away from the beginning of time. From wikipedia:

The age of the Universe is about 13.7 billion years, but due to the expansion of space we are now observing objects that are now considerably farther away than a static 13.7 billion light-years distance. The edge of the observable universe is now located about 46.5 billion light-years away.

Edit - Man UK

How do you explain cosmic background radiation then, if it is not the vestiges of the Big Bang? I completely disagree - we do not understand everything about how the universe was formed, but the Big Bang fits the theory best at the present time.

The Earth replaced into no longer shaped in the great bang. The universe replaced into shaped even nevertheless it replaced into VERY diverse on the commencing up. there have been no stars or planets previously each and every thing. It even took a while for the 1st atoms to kind, and those have been all hydrogen and Helium. Then hundreds of thousands of years later the 1st stars shaped. hundreds of thousands of years after that the 1st stars to undergo supernova explosions created atoms different than hydrogen and helium, which contain carbon, oxygen, and iron. hundreds of thousands of years after that clouds of dirt and gas containing the recent atoms started forming new stars and planets, which contain the sunlight and Earth. it somewhat is barely incorrect to declare the Earth replaced into shaped in the great bang.

The fact that so many gave the thumbs down to Man UK's answer so that his answer became minimised, shows that the Big Bang has taken on religious context. It is a theory, and everything in science is questionable - that is what makes science different from religion. That is what makes science believable, that theories are always being tested.

The Big Bang is the best fit for what is observed at the moment, but opens up more questions than it answers.

You are going completely mad.

For starters, photons were not free to travel through the universe for the first 300,000 years, therefore no light could have been emitted. Secondly, there was no universe to witness 1 million years before the big bang.

The earth was a part of the big bang dust. It didn't form until many years later.

That would indeed be true if there were no such thing as time dilation.

The so called "Big Bang" never happened , it is the biggest myth in science, in fact it is not science at all it is Religion masquerading as science.See Dr Rhawn Joseph's explanation below along with scientific papers from Dr Paul Marmet.