They did have one good lead to go on: when interstellar dust grains form in the cores of stars and are then ejected into space, they carry with them the signature of the event that produced them.

 
  • 科学家们确实寄希望于:当星际尘埃从恒星核心形成以及随后被抛入太空,携带着它们诞生时的信息。
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