天文距离
- 网络astronomical distance
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但是据NPR新闻的乔·帕尔卡报道,谈及天文距离时,“接近”是一个相对的说法。
But as NPR 's Joe Palca reports close is a relative term when it comes to astronomical distance .
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分隔我们的天文距离。
The astronomical distances which separate us .
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为了度量天文距离,人们把光在一年中走过的距离当作一个距离单位。
To measure astronomic distances one takes as a unit that distance which light travels in a year .
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然而,在和外星人联系中我们遇到的最大困难是分隔我们的天文距离。
But here we come up against the most difficult of all obstacles to contact with people on other planets & the astronomical distances which separate us .
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天文单位距离的光行时
Light-time for astronomical unit distance
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然后这边的木星到太阳有5个天文单位左右的距离,之后土星到太阳的距离大概有10个天文单位。
Then Jupiter 's right there at 5-point something , and then Saturn is about 10 astronomical units from the Sun .
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所以为了研究它们的起源,科学家们使用了天文望远镜观测到距离很远的星系,他们必须要追忆一下过往的岁月。
So to study stellar origins , scientists use telescopes that allow them to see galaxies that are so far away , they 're essentially looking back in time .