The Ancient Astronomy of Easter Island: Mars and Sweet Potatoes
  The role of the monument Moai a Mata Mea at Easter Island in the fertility cult has been explained. The own late statue that belonged to the ruling Miru group can provisionally be dated back to ca. 1691 A.D. on the backbone of the archaeoastronomical studies as well as the written sources. Some data about watchings of the total solar eclipse of September 16, 1773 A.D. and Halley's Comet of 1682 A.D. are presented as well. A new information on the early settlement of Rapanui is of our interest, too. 
Sergei Rjabchikov
physics.hist-ph