請求高手t幫我transcript左e段video....

The amount of power you can get from a star
is limited, according to Einstein’s famous formula E = MC^2 and if you know M - the mass, which you do know for stars, then we know the maximum amount of energy which you could get by any conceivable process.Once they knew there was a finite size to these explosions they could then work out how far away they were.

*(sori i hv to split them up becoz there're more than 2 thousand words.....cannot be submitted becoz of the stupid yahoo limit!!!)