BY; SIR JAMES JEANS, A few stars are known which are hardly bigger than the earth , but most of them are so large that hundreds of thousands of earths could be packed inside each and leave room to spare; here and there we find an immense star large enough to contain millions of earth. And the total number of grains of sand on all the seashores of the world such is the littleness of our home in space when measured up against the total substance of the universe.