The Vera C. Rubin Observatory released its first images taken with the world’s largest digital camera on June 23, 2025 (local ...

Detail ： GJ 504 b is an exoplanet orbiting a sun-like star GJ 504. It is estimated to be three to six times more massive than Jupiter, making it the least massive planet ever directly imaged. This ...

ベラ・C・ルービン天文台は、世界最大のデジタルカメラによる観測画像を 2025年6月23日（現地時）に初公開しました。今後、このカメラを用いた大規模撮像探査プロジェクト「LSST（Legacy Survey of Space and Time）」が本格的に始まります。LSST には、国立天文台の研究者を含む日本の研究者も多く ...

A Giant Cluster of Supermassive Black Holes Supermassive black holes, known as quasars, shine like cosmic beacons due to the vast amounts of energy released as they actively consume matter from their ...

Data Rights and Archiving Observers of Subaru Telescope will have exclusive access to their data for a period of 18 months (548 days) from the time of observation, after which the data will be made ...

国立天文台や東京大学の研究者を含む国際共同研究チームは、くじら座の方向の約 108 億年前の宇宙で 11 個の超巨大ブラックホールが一斉に輝く構造を発見しました。これほど密集した超巨大ブラックホールの集団が見つかったのは、初めてのことです。すばる望遠鏡による広視野観測と ...

説明 ： 太陽に似た恒星「GJ 504」を周回する惑星「GJ 504 b」は、その質量が木星の3～6倍程度と見積もられ、直接撮像された惑星としては最小の質量を記録しました。この「第二の木星」とも例えられる暗く低温の惑星は ...

Relevant Links Subaru Telescope Celebrates First Launch of New Laser Guide Star System (April 4, 2022 Topics) Subaru’s New Laser Guide System: First Launch Test on March 5-6, 2022 UT (October 4, 2022 ...

Accepted proposals for Semester S25B The Call for Proposals for Semester S25B received 139 submitted proposals for the Normal and Intensive Programs requesting a total of 319.96 nights. After ...

Notes: See “CCD information” for the detail. The CCDs are arranged on the focal plane with two different gaps of approximately 12 arcsec and 53 arcsec between neighboring CCDs. We recommend that you ...

Figure 3: The ghost patterns observed in a MOS data for LS-J (Left) and LS-H (Right) grisms. The pattern is embedded in the spectral data. We can sample the ghost pattern only using K-band light with ...