The original goal of 11 mag for the limiting magnitude was generally surpassed, however, with some observatories routinely measuring stars as faint as 13 mag.

I thought the sophists spent their lives measuring the moon and stars, and arguing whether matter was one or manifold.

Starting in the 1980s, astronomers began to use the facility to measure stars over long periods of time, which led to hunts for extrasolar planets, i.e., planets outside our solar system.

He developed the Finsen eyepiece interferometer to measure very close double stars.

The Kepler Mission has a primary goal of measuring the brightnesses of 100,000+ stars with unprecedented precision.

Dr. Robert Hanbury Brown, an engineer who drew on his pioneering work in radar to invent a way of measuring stars in distant galaxies, died Jan. 16 at a hospice in England.

This is different from the sailor's astrolabe which was used on ships to calculate their distance above and below the equator by measuring the distance of the sun and stars above the horizon.

The concept of right ascension has been known at least as far back as Hipparchus who measured stars in equatorial coordinates in the 2nd century BC.

The system was chosen to be medium-band, to ensure the possibility to measure faint stars.

While they can measure only relatively bright stars, that too is an advantage, he explained, because bright stars are easier to study.