  This paper is dedicated to the research of secrets of Easter Island (Rapa
Nui), a remote plot of land in the Pacific; the work includes not only
necessary ethnological data, but also some results on the archaeoastronomy. The
analysis of several rock drawings lets us date them. The priests Hina Mango and
Rahu (Rahi) were not only experts on the script, but also great astronomers.
There is abundant evidence that the priests-astronomers used the astrolabe in
their studies. The local astronomical terminology has been decoded. The
observatory at the ceremonial platform Ahu Tongariki has been investigated
carefully. The orientation of a female statue on the slope of the Rano Raraku
volcano allows us to suggest that it was an image of the Moon (the moon
goddess). A number of additional astronomical and calendar records in the rock
art and in the writing have been deciphered.
