We propose to locate transponders and atomic clocks in at least three of the Lagrange points of the Sun-Earth pair, with the aim of exploiting the time of flight asymmetry between electromagnetic signals travelling in opposite directions along polygonal loops having the Lagrange points at their vertices. The asymmetry is due to the presence of a gravito-magnetic field partly caused by the angular momentum of the Sun, partly originating from the angular momentum of the galactic dark halo in which the Milky Way is embedded. We list also various opportunities which could be associated with the main objective of this Lagrange Dark Halo Detector (LaDaHaD).

中文翻译：

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检测银河系暗晕的重力磁场-LaDaHaD任务概念

我们建议在太阳-地球对的拉格朗日点中的至少三个拉格朗日点中放置应答器和原子钟，目的是利用沿拉格朗日点在其顶点的多边形环沿相反方向传播的电磁信号之间的飞行时间不对称性。不对称性是由于存在部分由太阳的角动量引起的重力磁场，部分由源自银河系的银河暗晕的角动量引起的。我们还列出了可能与此Lagrange黑暗光晕探测器（LaDaHaD）的主要目标相关的各种机会。