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思わず息を呑む、木星の魅惑的な姿を捉えた特選画像

Photos ロゴ Photos | 23 枚のスライドの 1 枚目: A handout photo made available by the International Gemini Observatory shows Jupiter seen with Gemini's Lucky Imaging (issued 08 ay 2020). According to the Gemini Observatory's press release, this image showing the entire disk of Jupiter in infrared light was compiled from a mosaic of nine separate pointings observed by the international Gemini Observatory, a program of NSF's NOIRLab on 29 May 2019. From a lucky imaging set of 38 exposures taken at each pointing, the research team selected the sharpest 10 percent, combining them to image one ninth of Jupiter's disk. Stacks of exposures at the nine pointings were then combined to make one clear, global view of the planet. Even though it only takes a few seconds for Gemini to create each image in a lucky imaging set, completing all 38 exposures in a set can take minutes - long enough for features to rotate noticeably across the disk. In order to compare and combine the images, they are first mapped to their actual latitude and longitude on Jupiter, using the limb, or edge of the disk, as a reference. Once the mosaics are compiled into a full disk, the final images are some of the highest-resolution infrared views of Jupiter ever taken from the ground.

ジェミニ天文台が2020年5月8日に公表した木星の写真。2019年5月に撮影された9枚の高解像度赤外線画像を合成。 円形内の下部左側に見えるのが大赤斑(巨大な嵐=大気の渦巻き)。

© International Gemini Observatory/NOIRLab/NSF/AURA M H Wong (UC/EPA-EFE/Shutterstock
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