The observatory operates several telescopes at two locations in Flagstaff.

The observatory also operates telescopes in Florida and New Zealand.

The observatory currently operates as a 19th century observatory.

Since 1957 the observatory has been operating neutron monitors.

The observatory now operates as a science education project and is open to the public.

The observatory operated until about 1716 when the remaining instruments were moved to the Rundetårn (lit.

The observatory also operates two rubidium atomic fountain clocks, which have a stability reaching 7x10.

The observatories of Grimbergen and Hove were already operating for many years at that time.

Eight observatories are already operating there and another, which is under construction, should reign as the world's most powerful for a number of years.

Currently, the observatory operates four research telescopes at its West Texas site: