A typical telescope tracks an object by moving its mirror as the Earth rotates.

To do almost any scientific work requires that telescopes track objects as they wheel across the visible sky.

It is housed in a box-shaped building which rotates as the telescope tracks objects.

A telescope would have tracked Muller if he'd tried to leave.

The agency uses radar, telescopes and sensors to track about 7,000 manmade objects in orbit, he said.

Once the celestial object is acquired, the telescope will track its motion with a precision of a few milliarcseconds.

The system needed to keep them in shape while the telescope is tracking a celestial object is extremely complex.

The telescope has tracked the pulsar 18 hours a day, nearly continuously for over 20 years.

Once that takes place, I shall start the clockwork and the telescope should track the object until it disappears in the east.

One was that such telescopes cannot track their targets.