For the Public
Want to know about astronomy and Universe
Ephemeris Computation Office, NAOJ
With the “Sky Viewer” you can easily explore the appearance of a typical urban night sky (planets and constellations are visible).The Celestial Phenomenasection of the glossary explains the planetary phenomena terms: greatest elongation, opposition, conjunction, stationary, etc.
Want to get latest information of NAOJ
Social Media at NAOJ
NAOJ makes announcements via social media. For details, please refer to the social media list.
This pamphlet features introductions to NAOJ’s research targets, activities, organization, research facilities, projects, etc.
We, the National Astronomical Observatory of Japan (NAOJ), strive to be a research institute open to the public. Some of the facilities are open to the public to the extent that it doesn’t interfere with research activities. In addition to the latest observational instruments you can also see historical research equipment. You can feel the flow of history connecting past astronomical observations to current observations.
This site features visitors’ guides as well as directions to reach Mitaka Campus and other domestic and international facilitates.