Fermi paradox and continuation of human race.
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05-10-2014, 01:02 PM
RE: Fermi paradox and continuation of human race.
(05-10-2014 12:40 PM)One Above All Wrote:  
(05-10-2014 11:29 AM)Chas Wrote:  What disagreement?

Your "those numbers are sufficient" assertion.

They are simply sufficient for a reasonable discussion.

Skepticism is not a position; it is an approach to claims.
Science is not a subject, but a method.
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05-10-2014, 06:37 PM
RE: Fermi paradox and continuation of human race.
It would be my contention that any advanced civilization wouldn't want to contaminate our world until they think we could handle that kind of information and there could be rules in place for others not to have any contact.

Of course that doesn't explain why we haven't detected any signals from space. We detect stars going nova all the time. You would think a signal from a pre space exploration culture would be out there.

Insanity - doing the same thing over and over again and expecting different results
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06-10-2014, 03:00 AM
RE: Fermi paradox and continuation of human race.
(05-10-2014 06:37 PM)Rahn127 Wrote:  Of course that doesn't explain why we haven't detected any signals from space. We detect stars going nova all the time. You would think a signal from a pre space exploration culture would be out there.

Um...

The thing is... some of our most powerful radio emissions were decades, almost half a century ago. If anything, our radio emissions have gotten weaker over time as out technology has gotten better. Not to ignore that we're actually phasing out using radio and shifting to fibre optics and directed micro waves... So if anything our emissions will potentially drop to nil.

Against the wash of radiation in space... detecting anything smaller than the death of a sun really IS like watching for some one to shine a VERY powerful emitter (Radio, light, etc) RIGHT, SPECIFICALLY at you... across millions or billions of kilometers distance. Plus hoping you;re looking in the right direction.. that the emission last long enough for the various different rotations between multiple planets spin and orbits keep it 'on track' etc, etc.


From memory, one of our most primitive and hence most powerful radio transmissions was the 1940 Olympics. And, given the invers square law, I froget the distance at which those waves become swamped by the average, random stuff washing through space.

As for detecting novas 'All the time", sorry to nit pick, but isn't that more like "We see the death light of a distant star once every couple of decades... at most?"

Much cheers to all.
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06-10-2014, 04:23 AM
RE: Fermi paradox and continuation of human race.
(06-10-2014 03:00 AM)Peebothuhul Wrote:  As for detecting novas 'All the time", sorry to nit pick, but isn't that more like "We see the death light of a distant star once every couple of decades... at most?"

Much cheers to all.

We recorded 7 just this last September. Drinking Beverage

http://www.cbat.eps.harvard.edu/lists/Supernovae.html



This list is just the ones since 2013.

http://www.cbat.eps.harvard.edu/lists/Re...novae.html

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06-10-2014, 04:32 AM
RE: Fermi paradox and continuation of human race.
(06-10-2014 04:23 AM)EvolutionKills Wrote:  <snip>

The point remains that, in order to conserve energy, the goal is to make equipment more sensitive, rather than make transmissions more powerful. Given that CBR permeates the entire Universe, it's not surprising that we haven't been able to detect radio signals. Assuming, of course, that other civilizations communicate through electromagnetic waves, rather than, say, neutrinos.

The truth is absolute. Life forms are specks of specks (...) of specks of dust in the universe.
Why settle for normal, when you can be so much more? Why settle for something, when you can have everything?
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