论文部分内容阅读
6月7日,美国宇航局对外宣布取消一项X射线观测项目。这个名为GEMS(The Gravity and Extreme Magnetism Small Explorer Mission)的项目为美国宇航局两年前设立的,原计划整个项目利用3个天文望远镜捕捉来自黑洞、中子星等密度极高天体的扭曲X射线。“很明显,项目无法在成本上限下完成,宇航局决定不再将项目推进到执行阶段。”美国宇航局天体物理学部主任Paul Hertz这样解释该项目被取消的原因,他表示该项目在设立之初便确定了明确的成本上限。对于从事X射线研究的科学家们而言,这已经不是第一个坏消息了。早在一个月前,另外一个大型X射线项目
On June 7, NASA announced the abolition of an X-ray observation project. The project, called GEMS (The Gravity and Extreme Magnetism Small Explorer Mission), was set up two years ago by NASA and originally planned to use the three astronomical telescopes to capture distorted X-rays from highly densified objects such as black holes and neutron stars. “Obviously, the project can not be completed under the cost ceiling, and NASA has decided not to take the project to the implementation stage again.” "Paul Hertz, NASA’s director of astrophysics, explains why the project was canceled, The beginning of the establishment of a clear cost ceiling. For scientists engaged in X-ray research, this is not the first bad news. As early as a month ago, another large X-ray project