Beyond the local volume. I. HST ultracool dwarfs
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Ultracool dwarf stars and brown dwarfs provide a unique probe of large-scale Galactic structure and evolution; however, until recently spectroscopic samples of sufficient size,...
超冷矮星（Ultracool dwarf stars）与褐矮星（brown dwarfs）为探究银河系大尺度结构与演化提供了独一无二的探测手段；然而直至近期，具备足够规模的光谱样本仍……
