Astronomical Observatory Cosmos Dome

The Astronomical Observatory Cosmos Dome, better known as Bisei Astronomical Observatory, opened in 1993 in Bisei Town, part of Ibara City in Okayama Prefecture, Japan.

About Bisei Astronomical Observatory

Built on a mountainside location chosen for having the highest number of clear-sky days anywhere in Japan, Bisei is the largest public observatory in the country. Its 101cm-diameter telescope is the largest public telescope in Japan, drawing around 14,000 visitors each year. The town's commitment to dark skies runs deep: an Optical Environmental Disruption Prevention Ordinance was put in place back in 1989, specifically to protect the night sky that makes the observatory possible. The site is also linked to the nearby Bisei Spaceguard Center and Hoshizora ("starry sky") Park.

History

The observatory opened in 1993, built on the strength of Bisei's exceptionally clear skies and a local ordinance, introduced in 1989, that restricts light pollution to protect stargazing conditions.

Telescopes & research

Its headline instrument is a 101cm-diameter telescope, the largest telescope open to the public anywhere in Japan, housed in the Cosmos Dome that gives the facility its name.

Location & getting there

Bisei Astronomical Observatory sits on high ground in Bisei Town, Ibara City, Okayama Prefecture, Japan, chosen specifically for having the country's highest count of clear-sky nights.

Visiting Bisei Astronomical Observatory

The observatory welcomes roughly 14,000 visitors a year and is paired with the nearby Bisei Spaceguard Center and Hoshizora Park, making a full day trip possible. Check the official website for current opening hours and viewing sessions before visiting.

See your named star from here

With the largest public telescope in Japan, Bisei Astronomical Observatory is a genuine destination for viewing the coordinates of a star named through Star Register. See the star catalogue for details on how a named star's position is recorded.