Thursday, April 15, 2010

The universe is a HUGE relative time machine

Because light travels at a finite velocity, humans are able to look back into time by observing light from distant objects in space. Even by looking at the moon with the naked eye, you are seeing it as it was ~1.2 seconds ago. High-powered telescopes are able to see further back in time than the eye can almost to the beginning of the universe. If intelligent life in another galaxy is or has somehow observed the Earth, they would see it as it was further back in time relative to their distance to Earth. Is this a form of time travel or time machine?The universe is a HUGE relative time machine
You could say the exact same thing about sound, human perception, etc. It's a cool way to think about the universe, but you aren't really going back in time. You're just observing the effects of an action delayed.The universe is a HUGE relative time machine
[QUOTE=''BlueBirdTS'']You could say the exact same thing about sound, human perception, etc. It's a cool way to think about the universe, but you aren't really going back in time. You're just observing the effects of an action a little bit delayed.[/QUOTE] Is this why we are able to understand some of the universe and use that knowledge to progress more than other species?
I wouldn't call it a form of time travel as nothing is travelling back in time. Neither we nor the light is travelling back in time but rather it is travelling through time at the same speed as the laws of physics allows.
Damn I guess my idea was too far-fetched. It's still cool that we are able to see back in time, though.
You know, I was starting to think the universe was a neuron in some guy's brain :O !
EVERYTHING is an illusion.
It not really time travel or the sort. Mearly a snapshot of time long past.Away of looking at it would be: Ifobservers from a galaxy 65 million miles away saw the Earth from a super powerful telescope, they could see the dinosaurs, even though the dinosaurs are long dead and human have evolved into our current civilization. Furthermore, everthing we look at in the sky we are seeing a few years to billions of year ago, but what we see might not be the same in current time.Very cool knowledge. I love astronomy.:)
[QUOTE=''Xbot_720'']EVERYTHING is an illusion.[/QUOTE]If everything was an illusion we wouldn't call it an illusion. Unless your including doughnuts, THEN your right.

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