Big Bang Physics - explained simply
Physicists believe that the Universe was born about 15
thousand million years ago in a very hot, very very bright Big Bang and that
it has been slowly cooling ever since.
The Universe was like a giant thermonuclear reactor until, at
around three minutes, the reactions stopped, leaving a Universe composed of
hydrogen, deuterium, helium, and a little lithium.
The Universe is made up of about 75% hydrogen and 25% helium,
with just traces of heavier elements cooked up in stars to make everything
else that we consider to be 'ordinary' matter.
During the next 300 000 years the Universe slowly became
transparent as photons no longer interacted as soon as they were made.
Electrons were captured by the hydrogen, deuterium, helium and
lithium nuclei to form the first atoms.
The first galaxies took a 1000 million years to make, as
matter began to clump together in a way that is still not clearly
understood.
Gravity pulled the light elements together to form stars which
ignited, cooking up elements as heavy as iron. Some stars, at the end of
their lives, exploded in spectacular supernovae, rapidly generating even
heavier elements like gold and scattering them around the Universe. Slowly,
these elements began to clump together into planets. Molecules formed and
chemical processes began.
Finally, after 15,000 million years, intelligent beings like
you emerged from the stardust on one of these planets and began to
contemplate the Universe around them, trying to piece together the story
that led to us being here.
So, you decide for yourself:
1: WHY DID IT HAPPEN?
2: WHERE DID IT ALL COME FROM?
Answer: read the Bible, Genesis (the first book in the Bible)
chapter 1, verse 3. |
Questions
about LIFE and Belief - why are we here?
THINK! 
Scientists
have derived the "Big Bang" theory (and I have no problem with that). They
can explain the physics of what happened, right back to a split second
after the big bang started.