The National Astronomical Observatory of Japan (NAOJ) has released a major update to the Hyper Suprime-Cam Legacy Archive ...

Subaru Telescope is an 8.2-meter optical-infrared telescope at the summit of Maunakea, Hawaiʻi, operated by the National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural ...

The Subaru Telescope observed the interstellar comet 3I/ATLAS on January 7, 2026 (UT), after it made its closest approach to the Sun. By observing colors in the coma around the comet, astronomers ...

図2：彗星コマ中での酸素原子の発光メカニズム。彗星コマ中の水（H 2 O）や二酸化炭素（CO 2）は太陽の紫外線によって分解され、酸素原子がつくられます。この酸素原子は、オーロラと同じ仕組みで緑や赤の光を放ちます。水から作られた酸素原子は赤い光を出しやすく、二酸化炭素から作ら ...

すばる望遠鏡とその初代広視野カメラ「Suprime-Cam（シュプリームカム）」による観測から、木星の軌道付近に広がる「木星トロヤ群小惑星」の色と大きさの関係に新たな特徴が見えてきました。これまで大きな小惑星で見られていた色の違いが、小さな小惑星では異なる振る舞いを示すことが ...

Observations conducted with the Subaru Telescope and its first-generation wide-field camera, Suprime-Cam, have revealed new insights into the relationship between the color and size of Jupiter Trojan ...

An international team led by a researcher at the Chiba Institute of Technology has discovered an extremely rare phenomenon: a galaxy about 10 billion light-years away whose brightness dropped to ...

講書始（こうしょはじめ）の儀は、明治天皇が年初に漢書と和書についての講義を専門家から聴く儀式として 1869年に始まったそうです。1953年からご進講者は人文科学、社会科学、自然科学 ...

The "Kōsho Hajime" ceremony is an annual event held at the Imperial Palace in Japan, where His Majesty the Emperor listens to lectures on academic topics. This tradition dates back to 1869, when ...

Test observations using the next-generation adaptive optics system ULTIMATE-START, developed through collaboration between Tohoku University and the National Astronomical Observatory of Japan (NAOJ), ...

東北大学と国立天文台が協力して開発を進める次世代の補償光学「ULTIMATE-START（アルティメット・スタート）」の試験観測が、2025年12月に行われました。複数のレーザーガイド星を用いる ...

How did the construction of the Subaru Telescope transform Japanese astronomy? A new study provides a quantitative answer by analyzing scientific publications and their citation impact during the ...