每日天文图展示了韦伯太空望远镜拍摄的WR 140双星系统周围的尘埃环。这些环状结构可能是3D尘埃壳，其形成机制仍在研究中。该系统位于天鹅座，距离地球约6000光年，由一颗沃尔夫-拉叶星WR 140主导。沃尔夫-拉叶星以其强大的星风和产生重元素而闻名，这些重元素是星际尘埃的组成部分。双星系统中的两颗恒星以约八年为周期的椭圆轨道运行，每次接近时会喷射出更多尘埃，形成新的尘埃环。韦伯望远镜的红外图像揭示了比以往更多的细节和尘埃壳。

🔭 韦伯望远镜拍摄的图像揭示了WR 140双星系统周围的同心尘埃环，这些环状结构被认为是3D尘埃壳，但其确切形成机制仍待研究。

🌌 WR 140系统位于天鹅座，距离地球约6000光年，核心是沃尔夫-拉叶星，该类型恒星以强烈的星风和产生碳等重元素而著称，这些元素是星际尘埃的重要组成部分。

💫 WR 140双星系统中的两颗恒星以椭圆轨道运行，约每八年接近一次，每次接近时会喷射出更多尘埃，形成新的尘埃环，韦伯望远镜的红外图像捕捉到了这些细节。

📸 连续多年的观测显示，这些尘埃壳在不断向外移动，韦伯望远镜的观测提供了比以往更清晰的图像，显示了更多的尘埃壳层。

Astronomy Picture of the Day Discover the cosmos!Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.2025 January 29 Dust Shells around WR 140 from Webb Image Credit: NASA, ESA, CSA,STScI, E. Lieb (U. Denver), R. Lau (NSF NOIRLab), J. Hoffman (U. Denver) Explanation: What are those strange rings?Rich in dust, the rings are likely 3D shells -- but how they were created remains a topic of research. Where they were created is well known: in a binary star system that lies about 6,000 light years away toward the constellation of the Swan (Cygnus) -- a system dominated by the Wolf-Rayet star WR 140. Wolf-Rayet stars are massive, bright, and known for their tumultuous winds.They are also known for creating and dispersing heavy elements such as carbon, which is a building block of interstellar dust.The other star in the binary is also bright and massive -- but not as active. The two great stars joust in an oblong orbit as they approach each other about every eight years.When at closest approach, the X-ray emission from the system increases, as, apparently, does the dust expelled into space -- creating another shell. The featured infrared image by the Webb Space Telescope resolves greater details and more dust shells than ever before.Images taken over consecutive years show the shells moving outward. Tomorrow's picture: open space <| Archive| Submissions | Index| Search| Calendar| RSS| Education| About APOD| Discuss| > Authors & editors: Robert Nemiroff(MTU) &Jerry Bonnell (UMCP)NASA Official: Amber StraughnSpecific rights apply.NASA Web Privacy,Accessibility, Notices; A service of:ASD atNASA /GSFC, NASA Science Activation& Michigan Tech. U.