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图tu中zhong所suo示shi的de为wei我wo们men太tai阳yang系xi的de位wei置zhi，新xin发fa现xian的de行xing星xing距ju离li我wo们men1.3万wan光guang年nian，位wei于yu银yin心xin方fang向xiang上shang，是shi目mu前qian距ju离li太tai阳yang系xi最zui遥yao远yuan的de已yi知zhi行xing星xing之zhi一yi
腾teng讯xun太tai空kong讯xun 据ju国guo外wai媒mei体ti报bao道dao，到dao目mu前qian为wei止zhi，系xi外wai行xing星xing的de发fa现xian数shu量liang已yi经jing达da到dao数shu千qian颗ke，大da多duo数shu系xi外wai行xing星xing与yu我wo们men的de距ju离li都dou在zai数shu百bai光guang年nian，较jiao远yuan的de系xi外wai行xing星xing可ke达da数shu千qian光guang年nian，不bu过guo这zhe并bing不bu影ying响xiang科ke学xue家jia对dui更geng遥yao远yuan系xi外wai行xing星xing的de发fa现xian。美mei国guo宇yu航hang局ju公gong布bu的de最zui新xin消xiao息xi称cheng，在zai距ju离li太tai阳yang系xi1.3万wan光guang年nian外wai发fa现xian了le一yi颗ke系xi外wai行xing星xing，发fa现xian者zhe为wei斯si皮pi策ce红hong外wai空kong间jian望wang远yuan镜jing，使shi用yong了le微wei引yin力li透tou镜jing技ji术shu。这zhe颗ke系xi外wai行xing星xing成cheng为wei目mu前qian距ju离li太tai阳yang系xi最zui遥yao远yuan的de已yi知zhi行xing星xing之zhi一yi，由you此ci科ke学xue家jia也ye能neng够gou展zhan开kai对dui银yin河he系xi内nei行xing星xing分fen布bu规gui律lv的de研yan究jiu。
从cong图tu中zhong可ke以yi看kan出chu，新xin发fa现xian的de系xi外wai行xing星xing位wei于yu银yin心xin方fang向xiang上shang，这zhe里li的de时shi空kong环huan境jing更geng加jia复fu杂duo，毕bi竟jing这zhe里li的de天tian体ti密mi度du更geng大da，大da天tian体ti集ji群qun间jian的de引yin力li作zuo用yong更geng加jia显xian著zhu。由you此ci带dai来lai了le一yi个ge问wen题ti，在zai银yin河he系xi中zhong央yang隆long起qi附fu近jin的de系xi外wai行xing星xing能neng够gou实shi现xian均yun匀yun分fen布bu，越yue靠kao近jin银yin心xin时shi系xi外wai行xing星xing的de分fen布bu与yu银yin河he系xi旋xuan臂bi外wai围wei的de行xing星xing分fen布bu是shi否fou相xiang同tong？来lai自zi哈ha佛fo-史shi密mi森sen天tian体ti物wu理li中zhong心xin的de科ke学xue家jia珍zhen妮ni弗fu-怡yi认ren为wei我wo们men目mu前qian对dui银yin河he系xi中zhong央yang隆long起qi和he边bian缘yuan的de系xi外wai行xing星xing分fen布bu并bing不bu了le解jie，这zhe更geng加jia突tu出chu了le本ben次ci发fa现xian的de重chong要yao性xing。
在zai本ben次ci观guan测ce中zhong，科ke学xue家jia使shi用yong了le微wei引yin力li透tou镜jing法fa寻xun找zhao系xi外wai行xing星xing，借jie助zhu拉la斯si维wei加jia斯si纳na斯si天tian文wen台tai华hua沙sha望wang远yuan镜jing对dui银yin心xin发fa现xian进jin行xing扫sao描miao。微wei引yin力li透tou镜jing观guan测ce法fa的de建jian立li需xu要yao地di球qiu与yu两liang颗ke恒heng星xing处chu于yu一yi条tiao直zhi线xian上shang，如ru图tu所suo示shi，距ju离li我wo们men较jiao近jin恒heng星xing产chan生sheng的de引yin力li场chang能neng够gou形xing成cheng微wei引yin力li透tou镜jing，将jiang远yuan景jing恒heng星xing亮liang度du等deng信xin号hao放fang大da，如ru果guo前qian景jing恒heng星xing周zhou围wei拥yong有you行xing星xing，那na么me就jiu会hui对dui微wei引yin力li透tou镜jing形xing成cheng干gan扰rao，科ke学xue家jia只zhi要yao观guan测ce到dao微wei引yin力li透tou镜jing出chu现xian短duan暂zan扰rao动dong，就jiu暗an示shi前qian景jing恒heng星xing周zhou围wei存cun在zai行xing星xing。
到dao目mu前qian为wei止zhi，微wei引yin力li透tou镜jing法fa的de观guan测ce距ju离li在zai数shu万wan光guang年nian，极ji大da提ti升sheng了le科ke学xue家jia对dui系xi外wai行xing星xing的de观guan测ce距ju离li。来lai自zi俄e亥hai俄e州zhou立li大da学xue哥ge伦lun布bu分fen校xiao科ke学xue家jia安an德de鲁lu-古gu尔er德de认ren为wei微wei引yin力li透tou镜jing法fa已yi经jing能neng够gou对dui银yin河he系xi中zhong央yang隆long起qi附fu近jin的de恒heng星xing进jin行xing观guan测ce，判pan断duan它ta们men是shi否fou存cun在zai行xing星xing，从cong更geng大da的de尺chi度du上shang研yan究jiu银yin河he系xi庞pang大da的de行xing星xing世shi界jie。微wei引yin力li透tou镜jing法fa目mu前qian作zuo为wei其qi他ta观guan测ce方fang法fa的de补bu充chong，目mu前qian观guan测ce最zui远yuan的de系xi外wai行xing星xing距ju离li我wo们men大da约yue2.5万wan光guang年nian，位wei于yu银yin河he系xi中zhong央yang黑hei洞dong附fu近jin的de恒heng星xing系xi统tong中zhong，微wei引yin力li透tou镜jing法fa迄qi今jin发fa现xian的de行xing星xing数shu量liang为wei30颗ke左zuo右you，科ke学xue家jia正zheng在zai调tiao用yong斯si皮pi策ce望wang远yuan镜jing与yu陆lu基ji望wang远yuan镜jing联lian合he对dui更geng加jia遥yao远yuan的de恒heng星xing进jin行xing观guan测ce，试shi图tu发fa现xian神shen秘mi的de系xi外wai行xing星xing世shi界jie。（罗luo辑ji/编bian译yi）
【原文】
