How sure are scientists about the big bang theory? compared to other existing theorys?

Answer 1

Most cosmologists and astrophysicists think the big bang is right on. There are a few exceptions--Halton Arp, Fred Hoyle (who coined the term "big bang") and a handful of others.

There are a handful of problems with the original big bang model that are all pretty much solved through the addition of hyperinflation--an early stage of superluminal spatial expansion, very shortly after the big bang began.

One problem that remains to be solved by the current hot inflationary big bang model is that of baryon assymetry. One would expect much more antimatter in the universe than is observed.

Hoyle's competing model is the steady state theory. The discovery by Bell Labs in 1967 of the cosmic background radiation pretty much knocked all competing cosmology theories to the mat. Hoyle worked very hard to revive his steady state theory, and it is possible it could make a come back, but that does not appear to be likely.

Halton Arp suggests red shifts are quantized. I'm not sure what his cosmology requires--I think he does not really have an alternative to the big bang, he just thinks it isn't right.

I hear people knock the big bang theory fairly often, and that really puzzles me. It is as though they are unfamiliar with all the support it has. Spectroscopic analysis of the light from the most distant galaxies reveals ratios of primordial elements in close agreement with big bang predictions. The cosmic background radiation is another feather in the big bang cap--its nature and temperature are in close agreement with predicted values.

Finally, both the COBE & WMAP satellites have pegged the age of our universe at 13.7 billion years. The age of the earth was determined by geologists to be roughly 4.5 billion years old back in the 1940s. I have geology books with copyright dates of that period stating that figure. It has not changed in seventy years, and no matter how much we improve our observation equipment, it is highly unlikely the age of our universe will differ radically from 13.7 billion years 70 years from now.

Of course, science is not a popularity contest either. Someone wrote a book once titled, "100 Against Einstein." Einstein muttered, "it would only take one." When you have lots of independent, mutually supporting evidence that indicates the same thing, it takes a lot more than just one ill fitting piece of evidence to demolish a theory as strong as Einstein's theory of gravity (GR), special relativity, quantum mechanics, or big bang cosmology.

Answer 2

when scientist use the word theory, to them that means fact. theories are considered the best explanation for the observed phenomena. so therefore they are VERY sure that the big-bang happend just like they said it happened. the most conclusive evidence for the theory came when two scientist at bell labratories discovered the cosmic microwave background. something that was predicted by the theory before it was discovered. if the theory is correct then the universe should have an average temperature od 2.3 degrees kelvin. this is exactly what scientist found!!! hope this helps!!!!!

Answer 3

They are as sure about the Big Bang Theory as they are of the Theory of Relativity. It can be no other way. There is actually an echo of the Big Bang that is still there today. It is measured as background radiation. You can actually hear it. It is a very small amount of the 'static' you hear when between radio channels.

Answer 4

A scientist at a meeting said

It is as sure that the Universe started witha Big Bang as it is that Earth goes round the Sun.

if u arent sure of earth going round the sun then i cant help u

Answer 5

One thing about theories they come and go. The bigbang theory is no different it has come and will go. The only question is when it falls out of favor and when it happens I hope it is not replaced by another theory. My hope is the new idea will be something other than a theory.

Answer 6

"Existing theories?" There aren't any--if by that you mean competing or alternative hypotheses. The big bang is established fact.

Answer 7

Theory,s are like opinion,s .I think GOD got a big bang out of making the earth and all it,s glory.

Answer 8

Actually that is changing is we speak, New ideas relating to plasma physics and the EM properties of the universe are being studied in Cosmology.

Have a look for yourself>>>
http://video.google.com/videoplay?docid=4773590301316220374&q=thunderbolts+of+the+gods&hl=en

Answer 9

i think no longer something, choose comprehend no longer in basic terms have self assurance, you say you choose have self assurance God, shouldn't choose have self assurance something, could choose locate fact, ideals no longer replace fact, incorrect ideals can harm you, you waste plenty time circulate church each and every Sunday hear lies say you reside continuously, pay plenty money hear such lies, organic rules and strategies no longer hazard, it is creationist propoganda make fact sound undesirable, arouse emotions so which you no longer be logical, huge bang and God no longer in basic terms opportunities, I born Japan, Ameratsu is chief goddess at Japan, you may ask God, Yahweh, Ameratsu, Yu Ti, Brahma or huge Bang, I see huge Bang have some evidence, gods have not have been given any evidence.

Answer 10

It isn't quite a done deal, but it is close. When we get a better understanding of dark matter and some of the strange forms of energy now being proposed, we will be able to speak of it with more surety.