‘Continent Killer’ Asteroid On Possible Collision Course With Earth
October 31, 2011
Translation by Autumnson Blog
在一對衛星返回地球的後腳跟上 - 美國宇航局的上大氣研究衛星（UARS）和德國建造的Röntgensatellit（ROSAT） - 在過去兩個月出了另一顆物體準備撞擊我們的星球的報告。
Only this one is a 20 million ton asteroid that is currently heading towards us at 23,000 miles per hour, and could collide with our planet in approximately 25 years, Alex Hannaford of the Telegraph wrote on Sunday. The asteroid in question, Apophis, is more than 800 feet wide, comprised of a mixture of rock, ice, and dust, and has been dubbed “the continent killer.”
只此一家是一顆二千萬噸的小行星，目前在朝向我們以每小時 23,000英里，並可能碰撞我們的行星在大約 25年時間，電訊報的亞歷克斯漢納福德上週日寫道。問題小行星阿波菲斯是超過 800英尺寬的，由岩石、冰和灰塵的混合物組成，被稱為“大陸殺手。”
“There are two scenarios,” Hannaford writes. “The first, and thankfully most likely, is that Apophis will fly by in April 2029, the year it is due to make its first ‘close approach’, and that’s the last we’ll see or hear of it. The second is that during that approach, it’ll pass through what scientists refer to as a ‘keyhole’ — a small area of space that can alter the asteroid’s course due to Earth’s gravity.”
“有兩種情況，”漢納福德寫道。 “第一和最有可能謝恩的是，是阿波菲斯將飛在2029年4月飛過，在該年它到期作它的第一次”緊密接近“，而這是最後我們將會看到或聽到它。第二是，在該接近中，它將會通過科學家稱之為一個“鑰匙孔” - 一個小面積的空間由於地球的引力，能改變小行星的航程中。“
“If this happens, it’ll be on a massive collision course with us seven years later, likely to be April 13, 2036 — Easter Sunday,” the Telegraph reported added, noting that experts with NASA’s Jet Propulsion Laboratory in California claim that it is “too far away” to predict which of the two possibilities is most likely, but that they should be able to know more in the near future.
“如果這情況發生，七年後它會與我們在一次大規模的碰撞航程 ，可能是在2036年4月13日 - 復活節的星期日，”每日電訊報報導補充，指出與美國宇航局加州噴氣推進實驗室的專家宣稱，“太遙遠”來預測兩種可能性的那一種是最有可能的，但他們應該在不久的將來能夠知道更多。
“We don’t know precisely where Apophis is headed but we will soon, when it becomes observable again, probably in 2012 or 2013,” Paul Chodas of the U.S. space agency’s Near Earth Object (NEO) said. “Once we get radar on it we will be able to nail down its orbit and we will know the chances of it going through the keyhole and hitting in 2036. By that time, it could be a four in a million chance, and that could very well go down to zero.”
“我們不知道Apophis正確地向著那裡，但我們很快，當它變成再次可被觀察到的，可能是在2012年或2013年，”美國航天局近地天體（NEO）的保羅 Chodas說。 “一旦我們可在雷達得到它，我們將能夠敲定它的軌道，和我們就會知道它通過鎖孔的機會，並在2036年的打擊。到那個時候，它可能是一百萬分之四的機會，而且很可能會下降到零。“
That might not be the end of it, though, as Chodas told Hannaford that the asteroid could find another one of those “keyholes” — small regions of space that can alter the course of a passing asteroid, due to a planet’s gravity — meaning that even if it misses the planet the first time, it could theoretically return and collide with the Earth’s surface later on.
http://www.redorbit.com/news/space/1112411326/continent-killer-asteroid-on-possible-collision-course-with-earth/index.html
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