celestial object 中文意思是什麼
celestial object
解釋
天體-
As the nearest celestial body to our earth, the moon has, of course, always been a favored object for the amateur astronomer.
月球是最接近地球的天體，當然總是業余天文學家喜愛的對象。 -
513km s mpc, ie, for a celestial object 1, 000, 000 parsec away from us, its recession rate is 513km 1 parsec 3. 26 light years
513 km s mpc ，即一個距離我們一百萬秒差距的天體，它的退行速度是每秒513公里一秒差距3 . 26光年。 -
Secondly, based on the existing international technologic analysis, two different measurement schemes are proposed. one navigation scheme uses pixels as measurements vector, and the other one uses line of sight ( los ) of object celestial body and angles from probe to object body as the measurements vector
其次，通過對國際上現有技術的分析，給出兩種不同的導航觀測方案:一是利用圖像作為觀測量的自主導航;二是利用視線方向及夾角作為觀測量的自主導航。 -
On the contrary, an object reaches its lowest position when passing through the semi - circle which includes the nadir and the nearest celestial pole, and this phenomenon is called lower culmination
經過包括天頂的那半個子午圈時，天體到達最高位置，稱為上中天。經過包括天底的那半個子午圈時，天體到達最低位置，稱為下中天。 -
Mathematicians found that these highways always exist whenever two celestial bodies are revolving around each other. any object in these highways will always be attracted towards or driven away by gravity from l1 and l2, without extra energy input
數學家發現，在兩顆互相公轉的天體，總會存在這些管狀的曲面，當物體位處管上，便會被驅往或驅離l1或l2 。 -
The moon is the only celestial object other than earth that humans have visited. from the late 60s to the early 70s, u. s. a. had six crewed missions to the moon, called the apollo missions
月球是人類唯一踏足過的天體，自六十年代末期至七十年代初，美國名為阿波羅登陸月球計劃，便有六次升空任務能成功登陸月球。 -
Hero is merely a celestial object that is redder than the extremely red ero. the term hero was coined by a kyoto university astronomer, t. maihara
原來天文學家早已發現了ero extremely red object ，極紅天體， hero只是比ero更紅而已。 -
A celestial object will reach its highest position when passing through the semi - circle which includes the zenith and the nearest celestial pole, and this phenomenon is called upper culmination
包括天極天頂和天底的大圓圈稱為子午圈。當天體經過觀測者的子午圈時便稱為中天。 -
This instrument was mainly used to measure the altitude of a celestial object above the horizon
又叫地平緯儀，主要用於測定天體距離地平面的角度。 -
Finally, based on the observability analysis and error analysis, two autonomous navigation schemes for encounter phase are respectively proposed in detail. monte carlo simulations are done for the two schemes. by analyzing and comparing the simulation results, we can get the conclusion that, under the accuracy conditions provided by the instruments in existence, the position estimation accuracy for probe encountering object celestial body is 0. 42km and 0. 04km, which demonstrate the feasibility of the two navigation schemes
最後，在可觀性分析和誤差分析的基礎上，分別給出基於圖像測量的自主導航方法和基於視線方向及夾角測量的自主導航方法，並對這兩種方法進行蒙特卡羅數值模擬，通過對模擬結果的分析和比較，在現有儀器的測量精度下，探測器在與目標天體交會時刻的位置估計精度分別是0 . 42km和0 . 04km ，由此表明兩種自主導航方案都是可行的。
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