1 -- History of the Universe Made Easy (Part 1)
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Uploaded by potholer54 on Aug 7, 2007
Forget gods and goblins, here is the real story of how we know the extent of our universe in time and space. Throw away all those religious books and look at some hard evidence.
(Music: Wagner's Lohengrin Prelude)
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@niko25ish No. The BB and the age of the universe is based on observation and calculations based on known laws of physics.
HarshColby 20 hours ago
@niko25ish Your point?
You understand, don't you, that the reason the BB theory doesn't speculate on what exited pre-BB is that science doesn't put speculation into scientific theories. The BB theory is based on observation and calculations using known physics laws. Ideas about pre-BB cosmology are called hypotheses.
Speculation is left to philosophy.
HarshColby 20 hours ago
the origin and or the age of the universe is speculation, is it not?
niko25ish 22 hours ago
@HarshColby right, speculation.
niko25ish 1 day ago
@niko25ish It's not known that they did. The universe may have existed forever. The concept of "before" the BB may even be completely meaningless. So far as we've been able to observe, the laws of nature have been in force for 13.7 billion years. Even if the universe hasn't existed forever, speculating on what may or may not have existed, or speculating how the universe came to be is an unanswerable question. Until some data becomes available on which to base a conclusion, it's only speculation.
HarshColby 2 days ago
@HarshColby Understood; but how do scientists suppose the laws of physics suddenly came into being?
niko25ish 2 days ago
@niko25ish I understand it's only 1500 characters, and I didn't go into a lot of detail, but does that clarify in which ways your original statements were wrong? Is it more clear or did I just confuse things more?
HarshColby 3 days ago
@niko25ish Although there is a random factor to all things, the universe operates under the laws of physics. To say it was ' all...by random chance' is not accurate. For a mundane example: Throw a ball up in the air. Where it will land is random, in that the wind may blow, how hard you threw it will vary, but that's not to say it could land in China (assuming you don't live in China). It will land exactly where physics says it should land, if you had the information necessary to calculate it.
HarshColby 3 days ago
@niko25ish All space(time) started at once. There's no "primordial atom". At the earliest times, no matter existed. It was all energy.
In our solar system, gravity did what gravity does, brings matter together, first in an accretion disk, then solid or gaseous planets and a star.
Life is chemistry, which is governed by the laws of physics. This video is about the universe, and the origin of life can be found described in video 3 of this series: /watch?v=v8nYTJf62sE
HarshColby 3 days ago