Celestia Forums

First of all please note that I do not have any background in such matter ( I am a chemist) but I like to think about, so please excuse me for such may be stupid thinking and questions. I would like also to made a Big Bang of thanks to the professors that made Celestia that give me for the first time the real sensation of the immensity of the Universe and the relatively our microscopical dimension.

My first stupid thinking come up looking to the landscape I made for Stellarium (San Peter square) I recognize that the same persons are in different point of the square due to the fact that in the time I take the pictures the persons are moving. Now, could be possible that for example our galaxy is one of those observed by the Hubble telescope may be 5 billions or millions ly far from us but 5 billions or millions ly ago. In fact, at present time we do not know where the galaxies observed by the Hubble telescope are now.
Where was our galaxy some billions or millions ly ago?

Another stupid thinking that come up to me is about the dark matter.
Considering valid the theory of the presence of dark (invisible) matter to explain the lack of 95% of mass and energy toghether, and considering that this so called WIMP is around the galaxy and clusters, is theorized that this matter is formed from those, but could be possible that, instead, this matter is the origin of stars for some unknown interaction force and then the gravitational force become predominant. This thinking come up just looking to the ratio of the so called "normal or barionic" matter (about 5%) against the rest that is 6 to 20 times more at least reading around on this subject.
Normally, the "minor" is a derivation or trans-formation from the "major".

Another stupid thinking concerning the Omega
If the Universe formation started with the Big Bang, I do not understand why the universe could be not spheric. The explosion, without any barrier, is omnidirectional and then the "occupied" space should be spheric.

The last stupid thinking is concerning the movement of everithing we konow, from the electrons around the nuclei, the planets around the star, the stars around the galaxy, the galaxies around the cluster, the cluster around maxy clusters and these around what?
Could be possible that the primordial big explosion is still under way and everithing moves around it? Could be this hypothesis explains the expansion of the "occupied" space. In such case, when the activity of the Big Bang will stop (may be?) the Universe will start to collapse to form a mega-super-hypo black hole were all the matter/energy is collected and then, for some unknown interaction of the matter at that state, a new Big Bang will occurs forming again another Universe.

Finally the question of the questions: all the immense quantity of matter (hydrogen)/energy present in the Universe, visible and invisible, were come from? Who create the first BOMB if there was one?

Thanks to those have the patience to read may stupid thinking, but more to those that want explains to me where I am wrong.

Interesting questions. They concerns matters of general relativity, which, like the quantum mechanics, makes our comphrension of the world a bit undetermined and not simultaneous.

Gifra003 wrote:Now, could be possible that for example our galaxy is one of those observed by the Hubble telescope may be 5 billions or millions ly far from us but 5 billions or millions ly ago. In fact, at present time we do not know where the galaxies observed by the Hubble telescope are now. Where was our galaxy some billions or millions ly ago?

The bold statement can be misinterpreted from a "visual" point of view, because our light moves with us. Where was our galaxy 1 million of ly ago? It would have been in the space between our galaxy "now" and the Andromeda galaxy "now + 1/2 x now". But in such a space we don't see nothing. Thus like we don't see the "stamp" of the light of our 1 million ly old galaxy, we can't see such a "stamp" within billions of ly. When now-for-us that galaxies are billion of ly "old", now-for-them is our galaxy that is of the same "old" age. Like for us after billions of years is supposing someone dead, for them we are all dead too. Nobody knows nowaday where is the centre of the universe and the Big Bang is an explosion of space, not an explosion in the space. My 2 cents.

If you post your questions on the forum at http://cosmoquest.org/forum/forum.php
you will get detailed and accurate answers to your questions. There are many more people with scientific backgrounds on that forum than there are here, all of whom will be delighted to discuss any misunderstandings.

Thank you very much Fenerit.