Scientists think it will enter interstellar space in about four years.
科学家相信四年内它将进入星际空间。
WIDE ANGLE: Project Icarus: Reaching for Interstellar space.
广角：伊卡洛斯项目：延伸到星际空间。
Interstellar space is filled with clouds of gas and dust.
星际空间中充满了气体和尘埃组成的云。
Interstellar space is filled with clouds of gas and dust.
星际空间中充满了气体和尘埃组成的云。
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