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Planets around nearby star are intriguing candidates for extraterrestrial life

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15 hours ago, daveAustin said:

Common misconception that one would need to attain light, or faster than light, speed - e.g, typical thinking: if these exoplanets are 11 LY away > travel at light speed and get there in 11 years. As an outside observer, yes, but as per Einstein's equations and time dilation, one 'merely' needs to approach light speed to cross vast distances faster (for the traveller).

Ponder this: Light itself will cross the entire universe somewhere between instantaneously and a couple seconds.

Or so Einstein's Theories imply. I think he blew it with his time formulas. Instead it's mass and motion and space that affect everything including our perception of time, a contrivance of humans based on observed motion (IMHO). AFAIC, the Universe is "timeless".

 

As far as light's traveling instantaneously goes ... Huh?

 

 

 

 

 

 

Edited by MaxYakov

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5 hours ago, Samui Bodoh said:

When the first Europeans "discovered(?!)" North/Central/South America, they brought small pox which eviscerated the local populations who had no resistance to it. Hmm... Did the same occur in Australia with the Aborigines (any Aussies want to comment; I don't know)? I think the questions would be which civilization infected the other worse and which was able to withstand it. Hmm... and whether it would be seen as an accident or as biological warfare.

Yes, and when the Martians took over the Earth...

Quote

Now in a deserted and silent London, slowly he [the narrator] begins to go mad from his accumulated trauma, finally attempting to end it all by openly approaching a stationary fighting-machine. To his surprise, he discovers that all the Martians have been killed by an onslaught of earthly pathogens, to which they had no immunity: "slain, after all man's devices had failed, by the humblest things that God, in his wisdom, has put upon this earth".

Quote from describing the plot of H.G. Wells novel "The War of the Worlds", published in 1897...🙂

 

War_of_the_Worlds_original_cover_bw.jpg

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12 hours ago, Elad said:

From our perspective the light does indeed take that long to reach us. But according to Special Relativity time stops at the speed of light, so photons feel no time and also feel no distance, so for the photon the time from emission to absorption is instantaneous. 

Or they use an Einstein-Rosen bridge...
 

Quote

A wormhole (or Einstein–Rosen bridge or Einstein–Rosen wormhole) a speculative structure linking disparate points in spacetime, and is based on a special solution of the Einstein field equations. A wormhole can be visualized as a tunnel with two ends at separate points in spacetime (i.e., different locations, or different points in time, or both).

 

Wormholes are consistent with the general theory of relativity, but whether wormholes actually exist remains to be seen. Many scientists postulate wormholes are merely a projection of a fourth spatial dimension, analogous to how a two-dimensional (2D) being could experience only part of a three-dimensional (3D) object.

 

A wormhole could connect extremely long distances such as a billion light years or more, short distances such as a few meters, different universes, or different points in time.

Explanation from Wikipedia.

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3 hours ago, MaxYakov said:

Or so Einstein's Theories imply. I think he blew it with his time formulas. Instead it's mass and motion and space that affect everything including our perception of time, a contrivance of humans based on observed motion (IMHO). AFAIC, the Universe is "timeless".

 

As far as light's traveling instantaneously goes ... Huh?

 

 

 

 

 

 

I'll mention the easy part first. I think what daveAustin meant was this. According to Einstein's SR the 'proper time' as far as a photon is concerned is always at zero. Therefore, from the perspective of a photon going from from A to B no time passes. From an observers perspective the photon does take time to go from A to B. however, daveAustin is incorrect in saying that...'...a couple of seconds...'. The proper time of a photon is always zero.

'Time' is not so easy to discuss. Indeed, some scientists do consider our (one dimensional') 'arrow of time' is an illusion. My hypothesis, very, very briefly runs like this;

Perhaps my stance might be included in the idea of those that suggest that 'time' is an illusion,  although not necessarily so. The one thing that happens both at the quantum level and at the macro level is 'change'. At the quantum level we know that everything there is not static and at the macro level we see the process of 'ageing', which is just a change from one state to another. So in this sense 'time' is the rate of change (in SR v ∝ (1/(rc) ). Now, to quantize that would mean finding the shortest rate which produced a change (position, state). With the 'arrow of time' there is absolutely no chance of 'time reversal' since the definition essentially gives one direction.
Obviously there is a lot more to add, certainly mathematically because one needs to consider entropy, that is, some say the 'arrow of time' is connected to entropy while others say it isn't. Among my other considerations is 'time' that has more than one dimension but that's 'a completely different ballgame' as they say, both philosophically and mathematically, ha!

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20 hours ago, impulse said:

 

And yet, scientists tell us they're looking at cosmic events that happened 13 billion years ago, because that's how long it took the light to arrive...

 

Yep, it’s called the Cosmic Microwave Background. By the time it’s reached us, it’s in the form of microwaves. The interference you get ‘between channels’ on your tv is made up of about 1% of this. The Big Bang is on TV !!

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The edge of our solar system where the theorized Oorts Cloud is located is 1.87 light years from earth and the New Horizons craft, which is the fastest thing we’ve put into space so far, would take 37,000 years to get there. That’s just our solar system; it’s big.

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I actually still look for the answer. other than god created Adam and Eve, how life actually started on earth.

 

My belief is that humans are an advanced form of animals, probably monkeys, but how did the first animal arise.

 

Plants can arise spontaneously when oxygen and some other elements are present, but I don't think that counts for animals, and I also don't believe that animals are an advanced form of vegetation.

 

Anyone has a credible source which would answer my questions?

 

 

 

 

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and just about time a vaccine started to return life to a new normal a huge hovering alien craft systematically starts to vaporize huge swaths of the disease scarred earth..

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Nobody have ever seen a dinosaur, still from fragmented fossils we have a good idea of how they looked like and lived. 

Within the next 100 years I think we will find fossilized non-earthly DNA on an asteroid or Comet.

A computer simulation will be able to extrapolate how they might look like and finally we will know that we are not alone in the universe. 

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3 hours ago, Susco said:

I actually still look for the answer. other than god created Adam and Eve, how life actually started on earth.

 

My belief is that humans are an advanced form of animals, probably monkeys, but how did the first animal arise.

 

Plants can arise spontaneously when oxygen and some other elements are present, but I don't think that counts for animals, and I also don't believe that animals are an advanced form of vegetation.

 

Anyone has a credible source which would answer my questions?

 

 

 

 

Bacteria came first. Their are single celled organisms which are  half plant, half animal. Plants and Animals presumably diversified from that.

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14 hours ago, MaxYakov said:

AFAIC, the Universe is "timeless".

Based on what? It began at a time the stars formed and they will eventually run out of fuel, which will be the end of all life in the universe.

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5 hours ago, ExpatOilWorker said:

Nobody have ever seen a dinosaur, still from fragmented fossils we have a good idea of how they looked like and lived. 

Within the next 100 years I think we will find fossilized non-earthly DNA on an asteroid or Comet.

A computer simulation will be able to extrapolate how they might look like and finally we will know that we are not alone in the universe. 

With all the stars and planets in the universe it is inconceivable to me that we are the only planet with life on it. If there are more intelligent beings that have reached this planet I'm sure they have rigged a planet killer to destroy us if we ever look like escaping to further afield than Mars.

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10 hours ago, TKDfella said:

Among my other considerations is 'time' that has more than one dimension but that's 'a completely different ballgame' as they say, both philosophically and mathematically, ha!

There's more to heaven ( the universe ) and earth than we humans will ever understand ( IMO we'll pollute ourselves to extinction before we evolve enough to have a brain capable of understanding such things ).

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3 hours ago, thaibeachlovers said:

There's more to heaven ( the universe ) and earth than we humans will ever understand ( IMO we'll pollute ourselves to extinction before we evolve enough to have a brain capable of understanding such things ).

At this point imo we have the capacity to survive and follow a more beneficial course. I do admit, however, that at present we don't appear to have the inclination to proceed together and perhaps we need a unifying influence...unfortunately that's more the stuff of movies. Considering what we have learned without even leaving our domain shows that we have promise and if we could only enjoy the thought of the wonders that wait for us we would be on the right track. But alas, we seemed to have abandoned such an idea and are to concerned with our own importance and 'demons'. As I've said elsewhere, perhaps we need a 'restart', Ha!

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