How hard would it be to have this remade?



I think that's pretty much impossible to recreate until quantum computers become mainstream.

I dunno.. buy time on the Hubble?
 
That is a college weekend assignment for someone getting a degree in computer science.
 
Free.

Right click. View source. Save.


Phew, thank goodness there's no server side scripting... like PHP.


@op: not that difficult, just time consuming. It's just one big form and some PHP to handle the math. You could make it neater and not require a page submit with some AJAX, but as it sits, even a wannabe coder - like myself - could do it in a few hours.