... astronomical constants 天文常数 astronomical date 天文日,天文日期 astronomical distance 天文距离 ...
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... astron阿斯特隆 astronomical constant天文常数 astronomical maser天文脉泽 ...
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天文常数系统 astronomical constant system ; [天] system of astronomical constants
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研究人员发现在北方天穹，精细结构常数在越远的地方就越小，或者说天文学家所看到的过去越久远。
The researchers found that in the northern sky, the fine-structure constant gets smaller with increasing distance, or as astronomers look farther back in time.
这项技术如今更加精确，天文学家称，这样就可以推测更精确的哈勃常数值以及该值的不确定性。
The technique is now more precise, astronomers say, and so more accurate values for Hubble's constant and the uncertainty of the value of that constant can be reliably determined.
为了提高天文潮推算的精度，必须采用最接近推算年份的调和常数进行潮汐推算。
In order to improve the tide prediction, it is necessary to use new tide constants obtained from the nearest tide data.
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