Public Observatory 100th Anniversary Nationwide Simultaneous Astronomical Observation: Solar System Marathon
Experience

Public Observatory 100th Anniversary Nationwide Simultaneous Astronomical Observation: Solar System Marathon

Japanese name:公開天文台100周年記念 全国一斉天体観察会「太陽系マラソン」

📅 Sat, Nov 21, 2026

📍 Nayoro, Hokkaido

About this event

Commemorating the 100th anniversary of the opening of Japan's first public observatory, Kurashiki Observatory, the nationwide simultaneous astronomical observation event "Solar System Marathon" will also be held at Nayoro City Observatory "Kitasubaru." In this event, participants will observe the Sun, the Moon, and all the planets visible from Earth throughout a single day. The event is divided into three parts matching the optimal viewing times for each celestial body. Part 1 covers the Sun, Mercury, and Venus; Part 2 covers the Moon, Saturn, Uranus, and Neptune; and Part 3 covers Mars and Jupiter. Parts 1 and 3 will be held as special openings outside regular operating hours. No advance registration is required, and reception takes place at the observatory desk on the day of the event. Participating only in specific parts (celestial bodies) of interest is also permitted. Because solar observation is carried out using safe methods, caution is required not to look directly with the naked eye or ordinary telescopes. Warm clothing is recommended, as temperatures drop at night.

Source website (Japanese) ↗

Venue

Nayoro City Observatory (Kitasubaru)

157-1 Nisshin, Nayoro, Hokkaido 096-0066

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