A few hundred men had visited the moon, for the purpose of establishing a lunar observatory.

I have rocorded the spectrograms and light curves of dozens, since I started working at the lunar observatory.

Examples of suggested ancient astronomical complexes that may have been used as solar and lunar observatories include:

Scholars have demonstrated that the Octagon Earthworks comprise a lunar observatory for tracking the moon's orbit during its 18.6-year cycle.

He clarified his hypothesis that it was a lunar observatory for predicting eclipses.

Pyramidologists thought that in addition to their functions as temples and/or tombs, the pyramids also served as solar and lunar observatories.

Cochrane had had to put up his own money to have the nearside lunar observatory put a low-power telescope to watch the rocket's flight.

"You mean through observations by telescope from a lunar observatory?"

The Rotunda dome stuck out a bit, of course, as did, he supposed, some of the hardware of the lunar observatory, on the other side of the moon.

This makes the Newark Earthworks twice as precise as the lunar observatory at Stonehenge.