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Old 18th May 2013, 08:41 AM   #11
M Gregg is offline M Gregg  United Kingdom
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Quote:
Originally Posted by rdf View Post
Maybe something we don't yet understand impedes signals, who knows?
This was very interesting..I wonder what it is? The sides of the glass jar the universe is in..
All joking aside...I had not seen this and I wonder if there was any follow up? (more info)

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Old 18th May 2013, 10:12 AM   #12
M Gregg is offline M Gregg  United Kingdom
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Originally Posted by M Gregg View Post
All joking aside...I had not seen this and I wonder if there was any follow up? (more info)

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M. Gregg
That dosen't make sense..how does a signal travel that far, be reflected and come back to the origin??
Bounce? absorption..twisted and returned? on VHF?
http://www.computing.edu.au/~bvk/ast.../HET608/essay/

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What is the sound of one hand clapping?

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Old 18th May 2013, 10:31 AM   #13
godfrey is offline godfrey  South Africa
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Originally Posted by M Gregg View Post
That dosen't make sense..how does a signal travel that far, be reflected and come back to the origin??
Clue: check the date of that article.

Last edited by godfrey; 18th May 2013 at 10:34 AM.
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Old 18th May 2013, 10:35 AM   #14
M Gregg is offline M Gregg  United Kingdom
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Originally Posted by godfrey View Post
Clue: check the date of that article.
LMAO...

Thats about right..Oh look its an Alien...

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What is the sound of one hand clapping?

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Old 18th May 2013, 10:53 AM   #15
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The longest range signals sent from the Earth (VHF TV) are unlikely to be detectable beyond 100 LY. Modern digital signals won't make it more than a few LY and look too much like noise to detect easily.
While we can do paper design of fairly fast ships using ground laser or nuclear fusion drives, these have to be stripped down in weight far too much to shield the crew for centuries of interstellar radiation
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Old 18th May 2013, 05:17 PM   #16
rdf is offline rdf  Canada
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Originally Posted by davidsrsb View Post
The longest range signals sent from the Earth (VHF TV) are unlikely to be detectable beyond 100 LY. Modern digital signals won't make it more than a few LY ....
Covering a city with an electronic transport medium detectable from distant stars is incredibly primitive and inefficient. Since this paradox was first advanced TV antennas were largely replaced by cable and analogue NTSC by lower powered ATSC transmitters. In many cases the power difference is three orders of magnitude.
This is over the span of 50 years. In the millions forming the foundation of Fermi's objection it's impossible to know, and far from a given to predict, how more hypothetically advanced civilizations will move information.
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Old 18th May 2013, 06:55 PM   #17
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Originally Posted by M Gregg View Post
Yes however,

Think of the impact of knowing either..

A.There is nothing else..just us.

B.There is other life..

Can "A" ever be answered without "B" ?

Assuming the universe is infinite<<<it might not be..then we could only say well there is nothing everywhere we have observed or visited.

Here is a thought...if advanced aliens were sending out messages using quantum entanglement would we know about it? Would an advanced race use a communication that was limited to the speed of light over vast distances?

Cavemen listening for a shout across the valley..with no radio reciever?

The universe should be teaming with messages...so why isn't it?
Even if the messages were the low tech kind before they advanced..
So what does it mean if there is only us? Is it impossible to advance beyond a technological point..ie can we know all there is to know?

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The universe isn't infinite.
Hubble's law - Wikipedia, the free encyclopedia
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Old 19th May 2013, 09:51 AM   #18
M Gregg is offline M Gregg  United Kingdom
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Originally Posted by chris661 View Post
This would also be reflected in string theory..

Michio Kaku Explains String Theory - YouTube

However life across the universe is going to be much older than at this point.
So where are the ships as big as planets? The constant chatter of communication?

Just a few thoughts..

If the universe was "like" a drop of pond water ie it is conducive to life then if you could see it under a microscope it should be teaming with microbes and life should be abundant..ie like earth everywhere we see life..if life could exist everywhere it would be in space like an ocean..
We think life can exist anywhere by looking at the depths of the ocean..then we go to the moon..nothing...mars nothing yet...so life can't exist anywhere..its selective.<<<how selective..

If life came from comets then they must have hit other worlds so why not on the moon or mars?

How many hand types (not human) can you think of that could build something...to communicate you have to theoretically build a transmitter.
Every scifi film I see I have to think well they have another species that build the technology..because their hands could not build the things in the space craft or wepons like hand guns etc. Small components or robotics<<who builds the robots? Yes our equipment is built partly by robotics..but its single task ie the robot hand is for a specific job.

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Old 19th May 2013, 07:57 PM   #19
M Gregg is offline M Gregg  United Kingdom
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The universe?

Observable universe - Wikipedia, the free encyclopedia

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Old 20th May 2013, 07:03 AM   #20
gootee is offline gootee  United States
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Life, Doctor Who & Combom: Old TV Signals NOT Bouncing Back To Earth
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