The observatory building was completed by the end of 1884 and the first regular observations were begun on February 1, 1885.

Construction began in 1963 and regular astronomical observations commenced in 1965.

Since then, Earth-based telescopy has improved to the point where regular observations can be made.

A few weeks later he added regular observations on atmospheric electricity and changes in the magnetic elements.

If there is no evidence of thyroid hormone deficiency, you may just need regular observation by a health care provider.

Tycho at once commenced regular observations in such fashion as he could.

They can also discover comets, and perform regular observations of variable stars.

The facility was dedicated in 1986 and regular observations began in 1987.

Before long a mural circle was installed, and regular observations were instituted with it in 1833.

After a phase of performance and science verification, the Observatory was opened for regular observations in November, 2006.