<P> An X-ray telescope ( XRT ) is a telescope that is designed to observe remote objects in the X-ray spectrum . In order to get above the Earth 's atmosphere , which is opaque to X-rays , X-ray telescopes must be mounted on high altitude rockets , balloons or artificial satellites . </P>
<P> An X-ray telescope ( XRT ) is a telescope that is designed to observe remote objects in the X-ray spectrum . In order to get above the Earth 's atmosphere , which is opaque to X-rays , X-ray telescopes must be mounted on high altitude rockets , balloons or artificial satellites . </P>
where do x-ray telescopes have to be placed in order to view objects in space
where do x-ray telescopes have to be placed in order to view objects in space
mounted on high altitude rockets balloons artificial satellites
mounted on high altitude rockets balloons artificial satellites