draconids 中文意思是什麼
draconids
解釋
天龍座流星群-
Comet giacobini - zinner passed the perihelion on 3 july this year, it is still relatively close to the earth in october. some astronomers predicted that draconids may be worth watching this year
Giacobini - zinner彗星今年在7月3日通過近日點，至10月時與地球尚算接近，因此有天文學家認為今年可能會出現較可觀的天座流星雨。 -
You may capture the image of draconids with camera. basic equipment includes camera with long time exposure function bulb shutter and fast film
如要進行天文攝影，需配備具有" b "快門可作長時間曝光的相機和高速菲林。 -
The occurrence time the draconids maxima is as follows
這次天座流星雨的極大期時間如下： -
Draconids are easily recognizable as the meteors are much slower than other meteor showers
天座流星劃過天空的速度較其它主要流星雨慢，很易分辨。 -
However, even with the most optimistic prediction and the best observing environment, there will only be around few hundred of meteor, hardly comparable with 2001 leonids. according to some other astronomers, draconids may be just as sparse as in ordinary years
但即使最樂觀的估計及最佳的觀測環境下，每小時流星數量亦只有數百顆，與2001年獅子座流星雨仍有很大距離，亦有天文學家認為今年的天座流星只是寥寥可數。
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