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Originally posted by dionysius9
The question is "does life exist outside our own world?"
There are a LOT of anywheres out in that universe...
The Universe is so huge in fact that we’ll have to play around with scales so one can get a better idea.
Let's imagine that the entire universe that we have seen in all the worlds’ telescopes, all the galaxies, all trillion of them, extending out 13 billion light years in every direction is shrunk down to the size of a golf ball.
If we do a volume calculation, the actual universe contains 10 to the power 60 of those golf balls! Wow, I guess we didn't shrink things down far enough, but this will have to do. So how big a volume would 10 to the power 60 golf balls fill up? Try a sphere 850 light years across! So imagine a mass of golf balls that big, and each one of those golf balls contains all the stars and galaxies that we can see through our telescopes!!
Now let’s try it with speed. Ready? Imagine traveling so fast that you can go from on end of the galaxy to the other in just one second. At this speed the entire galaxy would be in reach before you can say the word "go", and wham, you're there! At this speed, you could travel to the nearest galaxy Andromeda in 22 seconds flat. And you could cross from one end of the visible universe to the other in 72 hours.
So, lets speed up our warp vehicles again, so that we can travel a quintillion light years every second. At such a speed we could cross the known universe 100 million times in one second.
So, how long would it take to cross from one side of the universe to the other?
…………….3.7 BILLION YEARS!!!………………
For arguments sake, lets imagine that primitive life happens once in the lifetime of a trillion galaxies, and out of those only one in a trillion ever evolves out of its womb planet into a space-faring civilization. In this example then we are still left with an astounding 10 to the par 75 advanced societies –more alien cultures than the number of atoms composing planet Earth!
Again, for some perspective on such a gargantuan number, there are more advanced civilizations partying it up around the galaxies than there are atoms in every single grain of sand on all the beaches and deserts in the world, and then some!
Originally posted by Badge01
If you were trying to communicate with someone from a distance, say a bunch of boy scouts setting up tents in a valley below, would you use a microwave transmitter sending binary code?
No. You'd send smoke signals or use a mirror to flash the sun, or use a campfire at night.
Also, it would be highly irresponsible for any technological civilization out there to send out a broadcast like the one shown in the movie "Contact".