Quote:
Originally Posted by bojan
Alex,
Every time you use your GPS, you have time dilatation experiment conducted and a proof is on the screen that Dr A. was right.
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Thanks Bojan..that has been put to me before and I forgot about it being offerred as hard evidence... I forgot to follow up, simply forgot, but I will try and work out how it fits in in a GPS......... I expect the speed of light when working out positions needs to be taken into account for position fixing because of the lag in transmissions... is that what they mean... anywyas I will try and track that down so I can see a working example of the theory..a practical application helps me understnad things better.
I imagine positioning would be a 4d estimate because of the time it takes for the sat to say where it is by the time the ground gets that the sat has moved on...anywyas I dont know and will look it up.
The dark matter thing frustrates me for sure.. I think it is a cop out really... and the attemps to infer its existence get to me... I just think there must be a better explaination ... and I know one can show it exists by "its" influence on sourounding matter... that is why it is there in the first place ..to explain the apparent gravitational influence of matter which must be there because if it wasnt we would not have the gravitational effects we observe... because we need matter in our sums.
The sums demand that it (dark matter)must be there because gravity is vieved as a relationship between mass..an attraction thing..
And we need the dark matter outside the galaxy so it beats me why they thought brown dwarfs or any other galactic body was relevent...the more matter you find in the galaxy only means you have to add 50 /60 % more matter outside... anyways any help you can give is always appreciated... my mind is never made up notwithsatnding I have definite views on some things.
BUt how unfortunate that I am so interested in this stuff and not foot ball say...
AND as to Dr A it must never sound like it but he is one of my heros..a role model...he is where I get my humility from
...I never though it was a good trait in a human until I met him...and I reckon he is right..his cosmological constant is what got me first thinking of push gravity.. I worked it up from that really..I never knew it was an old idea going back to Newton's times...
alex
