| 单词 |
horizon distance |
| 释义 |
horizon distance horizon distance (particle horizon) The total distance that a light signal could have traveled since the beginning of the Universe, and hence the maximum distance that can be seen in a cosmological model.horizon distance[hə′rīz·ən ¦dis·təns] (geodesy) The distance, at any given azimuth, to the point on the earth's surface constituting the horizon for some specified observer. |
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