If there was a big bang then were all the planets stars and even the human race all just an accident?

Answer 1

yes

answ2. YES, but. Accident is the wrong word, 'by chance' is a better one.

But the chance is not completely open.

If for example you put a lot of chlorine atoms and a lot of sodium atoms in a container, what would be the output? (Well, ignoring the vigour of the reaction for the moment.)

From a 'simple chance' point of view you would expect some NaCl, some Na2Cl5, Na3Cl6 and so on, for these combinations are all valid under simple chance.

But we both know that we'd only get NaCl. No fancy molecules.

For the nature of the elements concerned is such that they can only make the one style of molecule.

But this restriction is not so for carbon say, where we may have many organic compounds formed from O, C, and H. But with the same magic of electron bonds.

And whilst on the subject of Carbon, it was believed that it needed three Helium atoms coming together virtually simultaneously, to create an atom of carbon. And at an energy of 100 million K.* It was known that in the early phases of the beginning of the Big Bang, that due to its rapid expansion, there would not have been sufficient time to create the known carbon. As it quickly expanded it would cool equally quickly.

Later studies show that indeed such temperatures were available in the explosion of a super nova. Thus the C was created, and flung out into space as the nova spread.

* [note that at an atom or molecule level temperature is equivalent to particle velocity.]

BTW, Fred Hoyle who created the name Big Bang, was also a force in discovering the nucleosynthesis by which carbon could be made.

Answer 2

The Big Bang theory describes the early stages of the universe. While the formation of planets, stars, and life may seem accidental, they are the result of physical laws and processes operating over billions of years. The complexity and diversity we see today have emerged through natural processes, not necessarily by chance.