Radial velocities of stars in NGC 2302 field
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The spiral structure of the Milky Way (MW) is highly uncertain and is the subject of much discussion nowadays. Even the spiral structure close to the Sun and the real nature of...
银河系（Milky Way, MW）的旋臂结构具有高度不确定性，是当前学术界广泛讨论的议题。即便紧邻太阳的旋臂结构，以及其……的真实本质……
