Question

See my code: http://jsfiddle.net/NxNXJ/5

The star should be the same size as the sun at this link: http://astro.unl.edu/naap/hr/animations/hrExplorer.html, but this is not happening.

I’m not able to solve this. Thanks

Answer 1

Like this?

Your calc method should multiply val by the size of the sun, so that for example calc(1) returns a width equal to the sun’s width, calc(2) returns a width twice that of the sun, etc.

If you want the star to be initialized with the same size as the sun, set the slider’s initial value to 0 and call showBall(0). This will set the star’s size equal to the sun’s because 10^0 = 1, so the star’s size will be the sun’s size times 1.