Science going backwards
In his talk, A Universe From Nothing, Lawrence Krauss made me aware of something I hadn't expected.
In many thousands of years, if humans are still here, their science will go backwards in a significant way. By that time, only our galaxy will be visible. The other galaxies will be further away and moving away so fast that we will no longer see them. The very notion of galaxies other than our own will become nothing more than myth, changing how people in that time understand the universe. We have the evidence for what's out there, right now, beyond our own galaxy, but eventually that evidence will disappear.
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I'm not blind to your facial expression - but it may take me a few minutes to comprehend it.
A smile is not always a smile.
A frown is not always a frown.
And a blank look rarely means a blank mind.
Currently, our best telescopes have a discernible look-back of over 10,000,000,000 years. This means that even 1,000,000 years from now, our descendent will still have essentially the same view of distant galaxies as we do now.
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Would you believe writings from thousands of years earlier that said there used to be other things in the night sky?
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I'm not blind to your facial expression - but it may take me a few minutes to comprehend it.
A smile is not always a smile.
A frown is not always a frown.
And a blank look rarely means a blank mind.
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It's called 'Astronomy', which is a 'Science'. You might want to look these things up for yourself, instead of making up nonsense.
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Would you believe writings from thousands of years earlier that said there used to be other things in the night sky?
I'd believe photographs, particularly those taken by people who were right about most other things and empirically predicted the situation I found myself in.
In many thousands of years, if humans are still here, their science will go backwards in a significant way. By that time, only our galaxy will be visible. The other galaxies will be further away and moving away so fast that we will no longer see them. The very notion of galaxies other than our own will become nothing more than myth, changing how people in that time understand the universe. We have the evidence for what's out there, right now, beyond our own galaxy, but eventually that evidence will disappear.
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Tollorin
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It would must likelly take much more that "thousands" of years, propably BILLIONS of years. In the grand scheme of the Universe a few thousands years is nothing.
You're the one needing to do homeworks.
http://en.wikipedia.org/wiki/Big_Bang#Observational_evidence
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Jacoby
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Edgar Allan Poe described in his prose poem, Eureka, that the universe began with an "instantaneous flash" and could end with a collapse (this was almost 80 years before Georges Lemaître first noted that an expanding universe might be traced back in time to an originating single point).
I suppose that, as distance is increased between galaxies, science will need to be constantly rewritten. But, even the rewrites will need revision when the collapse is imminent; unless Red Dwarf is correct about life itself reversing to include backwards speech and backwards births.
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