There is a very simple article that could help you understand about our understanding of Universe/s. Who can say there is no civilization somewhere at any of these!

http://www.planet-science.com/categories/over-11s/space/2010/09/do-we-know-how-much-space-is-out-there.aspx

We cannot ignore the existence of anything just because we cannot see them or science cannot prove. We have limitations; science too.  We live in a human plane of existence within the limitations of human vibrations. There may be millions of planes of existence with millions of beings with their own levels of vibrations, which we cannot conceive with our limited senses. Whether we know it or do not know it, they exist. Existence is truth.  

The human knowledge gained till now is a spec. Before the limitless universe we look like midgets. There is much to know about the hidden mysteries of Universe. Inadequacy of human knowledge to unravel the mysteries of universe docent mean  that the universal mysteries do not exist.

suni51 wrote:

There is a very simple article that could help you understand about our understanding of Universe/s. Who can say there is no civilization somewhere at any of these!

http://www.planet-science.com/categories/over-11s/space/2010/09/do-we-know-how-much-space-is-out-there.aspx

 

Of course space is infinite. The likis regarding space. But here the issue is of of life at places other than Earth. 

 

Gulshan Kumar Ajmani wrote:

suni51 wrote:

There is a very simple article that could help you understand about our understanding of Universe/s. Who can say there is no civilization somewhere at any of these!

http://www.planet-science.com/categories/over-11s/space/2010/09/do-we-know-how-much-space-is-out-there.aspx

 

Of course space is infinite. The likis regarding space. But here the issue is of of life at places other than Earth. 

 

Sunil's link article is quite informative. It also provides the answer for your question if there is life on other planets other than earth. The article says to know how much space is there in space it takes an eternity. May be possible the information about space will remain as mystery forever. Science has innumerable issues especially on Space which are unanswered.

 

 

Science always mocks imagination but the dream and imagination paves the pathway for newer innovative dimensions, we did not know as ours own mind has limitations and human life has limitations in terms of age of life, so how could it reach some other solar systems which is far away from us and even to cross ours own solar system it would take life of humans so how could we know and send people to find the infinite, there should be some alternative ways which science till to date not been able to grasp about, there are every possibilities of existence of alien there and might be at moon ours own sub planets, still some question rises why after reaching to moon during 60s, the next possible manned mission which goes on hap hazard way after almost 25 years something is there which no one want to devolve, there is always something between the lines!!!!!!!!!!!!!!! was there signs of life at moon almost 50 years back food for thought for sure. 

To sum it all, as on date humans neither did find a reason or  solution to many of the mysteries hidden in universe, despite giant leaps taken by the technology. Hence, simply because we do not have answers to these innumerable mysteries, it is unwise to dismiss them as rubbish. It is also possible these mysteries will remain as mysteries forever.

Maybe not forever but we shall not be alive to witness them :)

True. such is the amount of space in the space. ( Your article was quite informative.) What we are before this vast universe and what we know about its hidden mysteries ? Mere SPECK

Someday someone like PK may wonder into the earth, if there are civiisations out their looking for other civilisations.