Big Bang Theory

[Avont]

hey, my names Avont, im in 10th grade, and iwas just wondering, they say all this talk about the big bang theory and it was started from an explosion from a single point in space.. how did that point get there? just a point come out of nowhere i just don't get it, someone had to place that point there, or something happened

 

 

and why can't darkmatter emit any light, so if you shined a flashlight on darkmatter, what would happen

[Bettina]

hey' date=' my names Avont, im in 10th grade, and iwas just wondering, they say all this talk about the big bang theory and it was started from an explosion from a single point in space.. how did that point get there? just a point come out of nowhere i just don't get it, someone had to place that point there, or something happened

 

 

and why can't darkmatter emit any light, so if you shined a flashlight on darkmatter, what would happen[/quote']

 

Hi Avont

 

I think you need to look around first. There are other threads like this that you could join and learn. Do a search and see...

 

Bettina

[Martin]

hey' date=' my names Avont, im in 10th grade, and iwas just wondering, they say all this talk about the big bang theory and it was started from an explosion from a single point in space.. how did that point get there? just a point come out of nowhere i just don't get it, someone had to place that point there, or something happened

 

 

and why can't darkmatter emit any light, so if you shined a flashlight on darkmatter, what would happen[/quote']

 

Bettina's advice to look around is pretty good. You can use the search tool in the menu at top to find threads about Big Bang

 

But if you want to find out reliable stuff about the Big Bang a good place to start would be an ONLINE SCIENTIFIC AMERICAN ARTICLE, by Charles Lineweaver and Tamara Davis. that way you avoid a lot of misconceptions. I will get links

 

this is a collection of Astronomy/Cosmology links we have at SFN:

 

http://scienceforums.net/forums/showthread.php?t=4133

 

Post #65 on that thread is this:

http://scienceforums.net/forums/showthread.php?p=142965#post142965

 

-----in case the link doesnt work, it says------

 

 

this bunch is from the Lineweaver and Davis article in March 2005 SciAm

http://www.sciam.com/article.cfm?chanID=sa006&colID=1&articleID=0009F0CA-C523-1213-852383414B7F0147

 

this was a feature article "Misconceptions about BigBang"

It had some sidebars which were pictorial diagrams with a question together with right and wrong answers explained.

 

http://www.sciam.com/media/inline/0009F0CA-C523-1213-852383414B7F0147_p39.gif

What kind of explosion was the big bang?

 

http://www.sciam.com/media/inline/0009F0CA-C523-1213-852383414B7F0147_p40.gif

Can galaxies recede faster than light?

 

http://www.sciam.com/media/inline/0009F0CA-C523-1213-852383414B7F0147_p42.gif

Can we see galaxies receding faster than light?

 

http://www.sciam.com/media/inline/0009F0CA-C523-1213-852383414B7F0147_p43.gif

Why is there a cosmic redshift?

 

http://www.sciam.com/media/inline/0009F0CA-C523-1213-852383414B7F0147_p44.gif

How large is the observable universe?

 

http://www.sciam.com/media/inline/0009F0CA-C523-1213-852383414B7F0147_p45.gif

Do objects inside the universe expand, too?

 

have to go, but may add some other stuff later

[Martin]

this Sci Am article will not answer all your questions

 

I think you will be able to think of better questions, though, if you read it first. and they you can always ask people here.

 

 

Cosmologists are the specialists that model the big bang and expansion of space and formation of galaxies, and try to figure out when various things happened.

 

the thing to realize if that at least at present cosmologists do not have answers for every question!

 

you will quickly find that you can think of questions to ask that do not have reliable mainstream answers----just a variety of guesses.

 

but my advice would be to read the Lineweaver and Davis Sci Am article first, especially the sidebars.

[bigsplit]

hey' date=' my names Avont, im in 10th grade, and iwas just wondering, they say all this talk about the big bang theory and it was started from an explosion from a single point in space.. how did that point get there? just a point come out of nowhere i just don't get it, someone had to place that point there, or something happened

 

 

and why can't darkmatter emit any light, so if you shined a flashlight on darkmatter, what would happen[/quote']

 

 

The Big Bang question is the most fundemental question to ask of such a theory. The answer to this question is that no one knows and the Big Bang does not even attempt to answer that question. There are hypothesis such as brane theory and an occilating universe that has existed forever (expand - contract...bang..expand contract).....but these are just speculations and not accepted by the mainstream.

 

As for your question on dark matter....We have never seen dark matter and can only see effects to galaxies and galaxy clusters that have caused the mainstream to theorize that there must be some matter there we cannot see. Just recently some theorist from Oxford have proposed that dark matter is the result of 3 extra spacial dimensions that are so microscopic we cannot observe them. Some have guessed that the extra gravity observed is the result of a geometric effect..most of these efforts do not comform to GR and BB cosmology....the fact is we do not know for certain what causes the observed gravitational effects....we just know it is there (the gravitational effect) and that mainstream physics needs unobserveable matter to account for it, aka "dark matter".