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What units do we think in terms of ? Theres this problem always of what units to remember disatnce and time in. when we were kids, we probably could get away with thinking in terms of metres and seconds. now the mind is exposed to lengths like AU (distance to sun) or light year. So also for time. I try hard to remember the age of the universe. It is some odd 13 billion years. And I am not the least upset that I forget this figure all the time. If only someone had told me abt wht 'billion' means as a child , and that too in context of time ! The point is that there is a multitude of range of space and time. The question I get is how do people remember times and distances. I assume each one has a 'default' unit that he/she thinks in. for example, we in India I think have been over-exposed to something called 'lakh'. In Europe you relaise that no-one would realise what you are referring to when you say lakh. lakh is this all-importatnt figure that people measure th

Stars

Well for some time I was thinking of blogging but was procastinating it for a long time .. until today ... A clear september night sky .. a couple of books on Subramanyam Chandrashekhar still fresh in mind .. and here I am gazing out of my bedroom window. Its 2 am in the middle of a cool night. Could it get better .. A peep outside and I see the constellation 'Cygnus'. They call it the northern cross or swan flying southwards .. all I see is the cross - the 3 stars going across and then theres Deneb right above the middle one .. Vega is there to the north of cygnus 45 deg below the intersection of the cross. Albiero, the bottommost star of the cross quite faint .. and then Altair on the other side completing the summer triangle. I am at a loss of words - to see the summer triangle which I have been wishing to see all this time and now its there at a glance outside the window. kudos to Deneb-Vega-Altair ! Now I wish to make the most of this opportunity. so here goes ... To the n