MOA Ongoing

摘要

A 1.8-meter telescope at Mount John University Observatory in New Zealand has been surveying the sky for microlensing events since 2006, driven by a collaboration among astronomers in Japan, New Zealand, and the United States. Microlensing Observations in Astrophysics (MOA) has the biggest field of view of any telescope involved in microlensing surveys: an area of 2.2 square degrees of sky. Observations using MOA have led to the discovery of rogue planets: planetary bodies that appear to be gravitationally unbound from any stars.