Laing, If everything in the universe doubled in size every second, the space between the sun and earth would double too.

It's simple algebra really.
x=earth y= space between earth andsun z=sun

x + y = z;
In English;The earth's location plus the distance between the earth and sun brings you to the suns location

Double it up.

2x + 2y = 2z
An Eart Double the size with a distance of double the original amount form the sun still brings you to the suns loaction even if it is double the size.



Thanks for the kind words Bilbs