The first X-ray telescope in astronomy was used to observe the Sun.

The X-ray telescope required little attention from the crew.

X-ray telescopes can use a variety of different designs to image X-rays.

The payload includes one ultraviolet telescope and four X-ray telescopes.

Astronomers say the X-ray telescopes will reveal a unique view of the exploding star.

"The engineers must have turned off the X-ray telescope since the last time I checked."

After that, I want to have the X-ray telescope reactivated.

"Why can't we have the low frequency radio on high digi-talization rate while the X-ray telescope is scanning?"

"The X-ray telescope uses a lot of power, especially when it is in the scanning mode," he said.

Perhaps the X-ray telescope will tell us something.