Question

If you wanted to detect x- rays coming from the sun, where would you place the detector? Why?

Answer 1

The sun does not emit X-ray. It emits about %45 visible light, about %50 IR and about %5 UV.

Answer 2

The Sun does emit xrays.

You'd have to place your sensor above the Earth's atmosphere because it blocks out nearly all x-rays. This is why we have the Chandra observatory ( http://chandra.harvard.edu/xray_astro/absorption.html).