01 JAN 2012 by ideonexus

 The Parallax Method

It is possible to measure how far away from us each galaxy is. How? How, for that matter, do we know how far away anything in the universe is? For nearby stars the best method uses something called 'parallax'. Hold your finger up in front of your face and look at it with your left eye closed. Now open your left eye and close your right. Keep switching eyes, and you'll notice that the apparent position of your finger hops from side to side. That is because of the difference between the viewpoi...
Folksonomies: measurement parallax
Folksonomies: measurement parallax
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Using the change in position of an object when viewed from two different points can be used to determine its distance from you.

23 MAR 2011 by ideonexus

 1973 Humanist Manifesto II - Ethics

Ethics THIRD: We affirm that moral values derive their source from human experience. Ethics is autonomous and situational needing no theological or ideological sanction. Ethics stems from human need and interest. To deny this distorts the whole basis of life. Human life has meaning because we create and develop our futures. Happiness and the creative realization of human needs and desires, individually and in shared enjoyment, are continuous themes of humanism. We strive for the good life,...
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Section on Ethics from the Humanist Manifesto.