On the arrival of the 20 th anniversary of the journal,Research in Astronomy and Astrophysics(RAA),we see rapid progress in the frontiers of astronomy and astrophysics.To celebrate the birth and growth of RAA,a specia...On the arrival of the 20 th anniversary of the journal,Research in Astronomy and Astrophysics(RAA),we see rapid progress in the frontiers of astronomy and astrophysics.To celebrate the birth and growth of RAA,a special issue consisting of 11 invited reviews from more than 30 authors,mainly from China,has been organized.This is the second volume of the special issues entitled Frontiers in Astrophysics published in RAA.The publication aims at evaluating the current status and key progress in some frontier areas of astronomy and astrophysics with a spirit of guiding future studies.展开更多
“卡西尼”号探测器从2004年进入土星系统,至今已13年。今年,“卡西尼”号的燃料所剩无几,不能再像以前一样大幅改变轨道,美国航天局(NASA)因此执行了“壮丽终章”(The Grand Finale)任务,在这最后一段旅程中,“卡西尼”号的...“卡西尼”号探测器从2004年进入土星系统,至今已13年。今年,“卡西尼”号的燃料所剩无几,不能再像以前一样大幅改变轨道,美国航天局(NASA)因此执行了“壮丽终章”(The Grand Finale)任务,在这最后一段旅程中,“卡西尼”号的绕行轨道进入土星大气层和土星环内侧,经过最接近土星的位置总共22次,一次又一次进行实地测量,希望能解答几个基本问题,例如土星的内部构造和非常对称的磁场来源。展开更多
文摘On the arrival of the 20 th anniversary of the journal,Research in Astronomy and Astrophysics(RAA),we see rapid progress in the frontiers of astronomy and astrophysics.To celebrate the birth and growth of RAA,a special issue consisting of 11 invited reviews from more than 30 authors,mainly from China,has been organized.This is the second volume of the special issues entitled Frontiers in Astrophysics published in RAA.The publication aims at evaluating the current status and key progress in some frontier areas of astronomy and astrophysics with a spirit of guiding future studies.
文摘“卡西尼”号探测器从2004年进入土星系统,至今已13年。今年,“卡西尼”号的燃料所剩无几,不能再像以前一样大幅改变轨道,美国航天局(NASA)因此执行了“壮丽终章”(The Grand Finale)任务,在这最后一段旅程中,“卡西尼”号的绕行轨道进入土星大气层和土星环内侧,经过最接近土星的位置总共22次,一次又一次进行实地测量,希望能解答几个基本问题,例如土星的内部构造和非常对称的磁场来源。