Scientists could tell it came from interstellar space because it was not affected by the presence of any planet, and because it flowed from precisely the same direction as neutral interstellar gas, which had been detected before.
Scientists could tell it came from interstellar space because it was not affected by the presence of any planet, and because it flowed from precisely the same direction as neutral interstellar gas, which had been detected before.
科学家能断定它来自星际空间是因为它没有受到任何行星的影响，并且和以前探测到的中性星际气体来自同一方向。