A lot of Galaxies

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[VENETO] boboviz
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Message 1825829 - Posted: 21 Oct 2016, 9:26:45 UTC

From Hubble:
Galaxies

Astronomers using data from the NASA/ESA Hubble Space Telescopes and other telescopes have performed an accurate census of the number of galaxies in the Universe. The group came to the surprising conclusion that there are at least 10 times as many galaxies in the observable Universe as previously thought


No life out there? It's impossible, i think
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Message 1825830 - Posted: 21 Oct 2016, 9:48:30 UTC - in response to Message 1825829.  

It does seem unlikely that we are alone, but only time will tell.
Bob DeWoody

My motto: Never do today what you can put off until tomorrow as it may not be required. This no longer applies in light of current events.
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Message 1825833 - Posted: 21 Oct 2016, 11:00:08 UTC

I think the main problem is distance. There may be many instances of life. Some microbial, some just learning to make tools, and some already extinct as well as every mix in between. The distances are just overwhelming.

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Profile William Rothamel
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Message 1825854 - Posted: 21 Oct 2016, 13:28:17 UTC - in response to Message 1825830.  
Last modified: 21 Oct 2016, 13:28:55 UTC

It does seem unlikely that we are alone, but only time will tell.


The most un-comforting thought is that we may never know.
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Message 1825939 - Posted: 21 Oct 2016, 18:53:49 UTC

What we could ever "see" in the universe is just a small portion of the whole, because of the cosmological horizons.

It is not really easy to understand but those links can help.

Observable universe: https://en.wikipedia.org/wiki/Observable_universe
List of cosmological horizons: https://en.wikipedia.org/wiki/List_of_cosmological_horizons
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Message 1826107 - Posted: 22 Oct 2016, 13:49:56 UTC

http://www.cnn.com/2016/10/11/health/interstellar-travel-space-physics/

Steve
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Message 1826829 - Posted: 26 Oct 2016, 19:09:05 UTC

What, if any, light (pun?) does this shed on expected amounts of visible matter and energy versus dark?
Capitalize on this good fortune, one word can bring you round ... changes.
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Message 1826838 - Posted: 26 Oct 2016, 20:32:15 UTC - in response to Message 1826829.  
Last modified: 26 Oct 2016, 20:34:15 UTC

Does it matter (pun again?) :)

"The results have clear implications for our understanding of galaxy formation"
It is from my understanding that in order to that galaxy formation occurs, dark matter and something more than ordinary matter have to exist giving the extra gravitational pull.

The findings seems only to reduce the expected amounts of exotic matter.
But not enough.
Scientists still have to explain the exotic matter needed.
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Message 1826849 - Posted: 26 Oct 2016, 22:44:24 UTC - in response to Message 1825829.  

I think live is so far away the only way we will ever know is if Seti detects signal, but we will not contact them the signal will take to long to get there as the signal we receive will have taken many years to get here.
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Message 1826876 - Posted: 27 Oct 2016, 2:42:55 UTC

If there is no way to work around the speed of light for human space travel then we will only be able to make one way trips to the nearest stars. We will probably get very proficient at travelling around our own solar system but interstellar travel will remain in the realm of science fiction.
Bob DeWoody

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Message boards : Science (non-SETI) : A lot of Galaxies


 
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