A lot of Galaxies

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

To post messages, you must log in.

AuthorMessage
[VENETO] boboviz
Volunteer tester

Send message
Joined: 5 Oct 99
Posts: 8
Credit: 529,921
RAC: 128
Italy
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
ID: 1825829 · Report as offensive
Profile Bob DeWoody
Avatar

Send message
Joined: 9 May 10
Posts: 2848
Credit: 1,215,344
RAC: 206
United States
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.
ID: 1825830 · Report as offensive
Profile SciManStevProject Donor
Volunteer tester
Avatar

Send message
Joined: 20 Jun 99
Posts: 6184
Credit: 109,158,475
RAC: 1,198
United States
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.

Steve
Warning, addicted to SETI crunching!
Crunching as a member of GPU Users Group.
GPUUG Website
ID: 1825833 · Report as offensive
Profile William Rothamel
Avatar

Send message
Joined: 25 Oct 06
Posts: 3335
Credit: 1,322,163
RAC: 0
United States
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.
ID: 1825854 · Report as offensive
burton449

Send message
Joined: 2 Sep 16
Posts: 7
Credit: 6,218
RAC: 0
Canada
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
ID: 1825939 · Report as offensive
Profile SciManStevProject Donor
Volunteer tester
Avatar

Send message
Joined: 20 Jun 99
Posts: 6184
Credit: 109,158,475
RAC: 1,198
United States
Message 1826107 - Posted: 22 Oct 2016, 13:49:56 UTC

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

Steve
Warning, addicted to SETI crunching!
Crunching as a member of GPU Users Group.
GPUUG Website
ID: 1826107 · Report as offensive
Profile Sarge
Volunteer tester
Avatar

Send message
Joined: 25 Aug 99
Posts: 11343
Credit: 4,629,835
RAC: 4,778
United States
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.
ID: 1826829 · Report as offensive
Profile janneseti
Avatar

Send message
Joined: 14 Oct 09
Posts: 14106
Credit: 655,366
RAC: 1
Sweden
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.
ID: 1826838 · Report as offensive
Profile bill
Avatar

Send message
Joined: 27 Apr 12
Posts: 171
Credit: 2,167,701
RAC: 0
United Kingdom
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.
ID: 1826849 · Report as offensive
Profile Bob DeWoody
Avatar

Send message
Joined: 9 May 10
Posts: 2848
Credit: 1,215,344
RAC: 206
United States
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

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.
ID: 1826876 · Report as offensive

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


 
©2017 University of California
 
SETI@home and Astropulse are funded by grants from the National Science Foundation, NASA, and donations from SETI@home volunteers. AstroPulse is funded in part by the NSF through grant AST-0307956.