They are just faint pinpricks of light in space, but they will give astronomers clues to what those distant planets are made of and how they formed.

它们在太空中只是一个个闪烁的亮点。但科学家会循此得出这些遥远的星体组成的成分和形式。

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The James Webb Space Telescope, which could launch as early as 2018 if Congress permits it, will be much more sensitive and could turn up still more tantalizing clues.

如果国会通过预算，James Webb天文望远镜最早能在2018年投入使用。 这架灵敏得多的望远镜可以揭开更多令人期待的线索。

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Still, for decades, scientists had clues that a vast cloud of antimatter lurked in space, but they did not know where it came from.

不过，数十年来，科学家们发现了表明在宇宙空间中存有大量反物质的线索，但是反物质从何而来科学家们还不知道。

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