How do we know there really was a Big Bang?

Answer 1

That is VERY good question. It is a theory but like most things is now touted as fact. The same thing has occured with the theory that we came from apes. On mainstream TV now supposedly intelligent like David Attenborough state that 'fact' without ever being challenged. I'd like to say 'who says?'
In the middle ages people who dared suggest that the earth was round were practically burnt at the stake or charged with heresy. Hasnt changed much has it?

Answer 2

It's a common misconception that the Big Bang was an "explosion" that took place somewhere in space. But the Big Bang was an expansion of space itself. Every part of space participated in it. For example, the part of space occupied by the Earth, the Sun, and our Milky Way galaxy was once, during the Big Bang, incredibly hot and dense. The same holds true of every other part of the universe we can see.

Artists may find it more dramatic to draw a "fireball" expanding into space, but as far as we know, there would have been no such "ball."

As mentioned above, we observe that galaxies are rushing apart in just the way predicted by the Big Bang scenario. But there are other important clues.

Astronomers have detected, throughout the universe, two chemical elements that could only have been created during the Big Bang: hydrogen and helium. Furthermore, these elements are observed in just the proportions (roughly 75% hydrogen, 25% helium) predicted to have been produced during the Big Bang. This prediction is based on our well-established understanding of nuclear reactions - independent of Einstein's theory of gravity.

Answer 3

Three scientists separately came up with the math equation for the energy fusion aspect and distribution of mass based on Einstein's relativity equations.

One of them postulated that all stars and galaxies are moving away from us (Hubble later confirmed this) and that there would be a background cosmic radiation signature (Bell Labs found this in the 1960s).

As a result of all these factors it is viewed that Big Bang has merits as an idea.

Answer 4

The big bang theory accounts for more of what we can observe than any other theory. But it IS a theory only.

By way of comparison, our knowledge of gravitation is theoretical only, also. We don't have all the answers as to how gravity works ( in all of its specifics) but the general theory is coherent.

That is also true of cosmology.

Answer 5

So much ignorance here, it's quite appalling. Do you people actually understand how science works? It isn't a popularity contest, or a "see who has the most exciting theory" contest. Scientific theories succeed or fail based on the strength of their supporting evidence. Without evidence, theories fall flat on their faces. The reason why ideas about evolution and the origin of the Universe hold such sway with scientists is because the observed data STRONGLY SUPPORTS these theories.

Have you heard of the Cosmic Microwave Background Radiation? Ever heard of Penzias and Wilson? Do your research people instead of scoffing at stuff you clearly know very little about. Look, I've even provided you with a link.

READ IT.

Answer 6

How do we know? We listen to the answer when we ask a question. So far you have asked 7,325,982 questions about the big bang, you must be a world authority on the subject.

Answer 7

Because we can hear it's echoes.

Background cosmic radiation maps are the smoking gun, proof positive.

By the way, re answer above, in Science 'Theory' does not have the same meaning as in everyday English. A Scientific Theory is the highest state of established proof - it does not mean a guess or a hunch that lacks evidence - exactly the opposite!

Answer 8

C) The Quran on the Origin of the Universe:
The science of modern cosmology, observational and theoretical, clearly indicates that, at one point in time, the whole universe was nothing but a cloud of ‘smoke’ (i.e. an opaque highly dense and hot gaseous composition).1 This is one of the undisputed principles of standard modern cosmology. Scientists now can observe new stars forming out of the remnants of that ‘smoke’ (see figures 10 and 11).
http://www.islam-guide.com/ch1-1-c.htm

Answer 9

we dont even know who killed JFK FOR CERTAIN what chance have we of proving the big bang it is all assumption and theory based on the facts that are known to us today.

it will always remain a theory and almost never be proved beyond reasonable doubt

Answer 10

It's a case of accepting that or thinking there's an old man with a beard looking down on you.

Your choice.