然而如今航海家一号却出乎意料的处在一个相对平静的空间区域中。
But instead the spacecraft now finds itself in an unexpectedly tranquil zone.
事实上根据自然杂志的一项任务更新，航海家一号在这种状态下已经飞行了上亿公里了。
And it has unexpectedly stayed that way for hundreds of millions of kilometers, according to a mission update in the journal Nature. Stamatios Krimigis et al.
发射于1977年的航海家一号如今距离地球已有170亿公里，现在应该已经接近太阳风顶层，在那里从太阳发射出的等离子太阳风已经不能抑制来自星际空间的宇宙射线。
It's now 17 billion kilometers from Earth. And it should be close to the heliopause, where the plasma flowing outward from the sun no longer holds back the interstellar winds.
发射于1977年的航海家一号如今距离地球已有170亿公里，现在应该已经接近太阳风顶层，在那里从太阳发射出的等离子太阳风已经不能抑制来自星际空间的宇宙射线。
It's now 17 billion kilometers from Earth. And it should be close to the heliopause, where the plasma flowing outward from the sun no longer holds back the interstellar winds.
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