天文科普《兩星繞轉目擊回憶錄》

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yudingyu

電梯直達

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發表于 2017-1-20 10:11:24 | 只看該作者 |倒序瀏覽 |閱讀模式

天文科普《兩星繞轉目擊回憶錄》

Memorizing the witness of two stars rotating each other
YuDingyu/YuDingwen

有一天晚上，我們在戶外，抬頭看見滿天星星，像海灘上的沙子，一層壓一層的。這時，有一顆星星(為行文方便起見，我們不妨把這顆星星叫做A星）突然移動起來，并逐漸加快。當它移到另一顆星星（我們把這顆星星叫做B星）的一側時，這兩顆星星順勢互相環繞，各繞了半周，A星繞到了B星的另一側。然后,A星又順勢返回去了，并逐漸減慢，最后停在它起動的位置附近。

One evening, I rambled outside to feel the quiet atmosphere and watched numeral stars twinkling on the sky. Suddenly, I noticed that one star (for convenience we call the star as star A) started to move. It moved slowly at the beginning and getting faster. When it moved close to another star (we call this star as star B) the two stars started to go around each other for a half circle. Star A moved to the other side of star B, and then moved back in the coming direction with gradually reduced speed, and finally stopped at nearly the original position.

兩星的起始距離約為月面直徑，走過這段距離所用的時間約為5秒。A星沿半圓弧的近似切線，做加速運動。同時，B星也有少許與A星相向的運動，其速度和距離大約都是A星的四分之一幅度。環繞時兩星在同一條旋掃直徑的兩端，距離約為月面直徑的五分之一，環繞半周所用的時間約為1秒，畫出的兩段弧近似于兩個半圓弧，A星畫的是大弧，B星畫的是小弧，很像運動員拋鏈球時的旋轉。兩星返回的最后距離約為月面直徑，返回所用的時間約為5秒。A星返回方向與移過來的方向相反，沿半圓弧的近似切線，做減速運動，很像剛拋出去的鏈球。同時，B星也有少許與A星相背的運動，其速度和距離大約都是A星的四分之一幅度。A星的整個運動軌跡很像自行車的鏈條，B星的軌跡很像一只雞蛋。最終兩星都停在它們各自起動的位置附近，就再也不動了，很長時間兩星都不動了。

The distance between the two stars before star A moved looked like the same as the diameter of the moon. It took star A about five seconds to move through this distance. The star A moved along the tangent of its half-circle locus and with increasing speed. At the same time, star B also moved toward star A for a quarter of the distance that star A moved, and the speed is also about a quarter of that of star A. When they were moving around each other, they were at the two ends of a diameter of the circle locus, and the distance between them were about one fifth of the diameter of the moon. It took about 1 second for them to move for a half circle, and their locus were nearly two half circles. Star A draw a big circle while star B draw a small circle, both of which were similar to the hammer that was threw out by an athlete. At the same time, star B had also movement away from star A, and both the distance and the speed were about a quarter of that of star A. The whole moving locus of star A were very similar to the chain of a bicycle, whilst the whole moving locus of star B was similar to an egg. Finally, the two stars stopped at near their original positions and never moved again for quite a long observing time.

該天文現象發生的時間大約是1965年，12月份，某一天晚上20點左右（北京時間）。觀測地點在中國長春市郊區(約東經125度，北緯44度）。該雙星在天空中的位置接近正東方向，距天頂約20度。A星移過來時的運動方向接近自北向南，返回去時的運動方向接近自南向北。環繞可能是反時針方向。這兩顆星的亮度接近相等，不是很亮，但肉眼可以清楚看見。整個運動過程及其后很長時間，兩星的亮度都沒有變化。

It was about 8 o’clock in the evening of Beijing time in December 1965 when this astronomic phenomenon was happen to be observed, but the exact date could not be recalled. The observing place was in the suburb of Changchun (the altitude is about 125oeast and the latitude 44o north), in the northeast of China. The location of the two stars in the sky is described as of 70o above the horizontal in the east. The approaching direction of star A to the star B was from the north to the south, and the returning direction was from the south to the north. The direction of the moving around a circle was probably anti-clockwise. The brightness of the two stars was similar and was not very bright, but could be seen clearly by the naked eyes. The brightness of the two stars were not changed during the whole observing process.

由于當時對此天文現象認識不足，沒有刻意記錄準確的時間，也沒有測量天區及認定星座，拖延的時間太久，以至削弱了其應有的科學價值，筆者深表歉意。這兩顆星現在還在天上掛著，天氣晴朗時，肉眼仍能看到，只是筆者已認不準是哪兩顆了。任何現象都會留下蛛絲馬跡，有興趣的朋友可以根據本文提供的線索跟蹤觀測，最終一定會把這兩顆星找到的。即使繞轉偏心率越大，周期越長，也總會有個周期吧。如果能對下次繞轉做出預報，讓大家都能目睹這一奇觀，不失為愛好者的一件幸事。

Due to the lack of knowledge in the field of astronomy at the time, the author neither recorded the exact happening time, nor measured the location area. The name of the star system was also not identified. After so long time, the academic value of the observation, which is supposed to be significant, may be degraded, for which the author feel deeply sorry. It is believed that the two stars are still on the sky and should be seen at night when it is clear, but the author is not sure which two they are. However, there must be some traces left if anything happened in the universe. Therefore, any people having interests could make observations following the information provided here. And I believe that the two star would be found finally. Through a big eccentricity will result in a long cycle of this star system movement, the cycle is a finite value. If it can be predicted for the time of next movement of the two star system, it would be fantastic for all the interested people to have chance to observe this wonder of the universe.