【知識補充-天文】20日凌晨，賽丁泉彗星與火星親密接觸，百萬一次相遇

喜歡天文的大朋友小朋友有福囉!在今晚(20號)凌晨2點27分，賽丁泉彗星將以時速14萬公里掃過火星。記得在等待的同時，要隨身攜帶保暖外套喔!!因為今晚又要變天囉!

賽丁泉彗星是來自太陽系的外圍的『奧特雲』雲端，約在45億年前形成，彗星編號為C/2013 A1。在2013年1月3日在澳洲賽丁泉觀測站新發現的一顆彗星，因此，也被命名為塞丁泉〈Siding Spring)彗星，發現者是羅伯特，麥克諾特 (Robert McNaught)。這次，賽丁泉彗星造訪火星，將為天文學家與天文迷帶來一大貢獻。我們一起拭目以待吧!

[Knowledge- Astronomy] Once in a million years: Siding Spring comet will close Mars on 20 October!

The comet is from "Oort cloud" outside of the solar system and it was discovered by Robert H. McNaught. at Siding Spring Observatory on 3 January 2013. Therefore, it is named Siding Spring (C / 2013 A1).The Siding Spring comet visit Mars tonight, it will fly at a speed of 140,000 kilometers per hour by Mars. It will be nearest and closest to Mars after million-year journey. If you are interested in astronomy, you could not miss extraordinary sight at 2:27 a.m.(in Taiwan). Let's wait and see what happens. J