韦伯望远镜发现系外恒星有3道尘埃环

【韦伯望远镜发现系外恒星有3道尘埃环】天文学家利用詹姆斯·韦伯空间望远镜观察太阳系外恒星“北落师门”周围尘埃，结果发现共有3道尘埃环围绕这颗恒星，其中两道为首次发现。美国国家航空航天局网站8日发布消息说，这3道尘埃环呈同心圆状环绕北落师门，从这颗恒星向外延展出去230亿公里，相当于从地球到太阳距离的150倍。相比太阳系中的小行星带和柯伊伯带，这3道尘埃环结构更为复杂，相关研究报告刊载于当天出版的英国杂志《自然·天文学》。","multimedia":{"img_url":["https://n.sinaimg.cn/zhibo/105/w898h807/20230509/a3fb-46fa2c58e12c92574defb4a021ae203f.png"]},"commentid":"live:finance-152-3102325:0","compere_id":0,"creator":"wangxiang8@staff.sina.com.cn","mender":"wangxiang8@staff.sina.com.cn","create_time":"2023-05-09 19:04:23","update_time":"2023-05-09 19:04:30","is_need_check":"0","check_time":"1970-01-01 08:00:01","check_status":"1","check_user":"","is_delete":0,"top_value":0,"is_focus":0,"source_content_id":"0","anchor_image_url":"","anchor":"直播员","ext":"{"stocks":[],"needPush":false,"needAIPush":false,"needCMSLink":true,"needCalender":false,"needProvince":"0","docurl":"https:\/\/finance.sina.com.cn\/7x24\/2023-05-09\/doc-imytetuu8584853.shtml","docid":"mytetuu8584853"}","old_live_cid":"0","tab":"","tag":[{"id":"8","name":"其他"}],"like_nums":0,"comment_list":{"list":[],"total":0,"thread_show":0,"qreply":0,"qreply_show":0,"show":0},"docurl":"https://finance.sina.cn/7x24/2023-05-09/detail-imytetuu8584853.d.html","rich_text_nick_to_url":[],"rich_text_nick_to_routeUri":[],"compere_info":""},{"id":3102324,"zhibo_id":152,"type":0,"rich_text":"巴西央行发布了5月2-3日会议的记录，会议决定将基准利率保持在13.75%不变。