原文標(biāo)題：Asteroid close encounter with earth, no threat
官網(wǎng)日期：11-09-2011 14:50 BJT


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asteroid / Asteroid 2005 YU 55
Earth
23:28 GMT
NASA

主持：阿拉蕾WL
校對：jushua
翻譯：彩云國

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【聽寫回顧】點(diǎn)擊回顧上一期聽寫："天宮1號"和“神州八號”第二次對接按時進(jìn)行?
A black asteroid as big as an aircraft carrier has passed close by to Earth, but experts say it poses no threat to our planet, or the moon. About 400 meters in diameter, Asteroid 2005 YU 55 is the biggest asteroid to pass close to Earth since 1976. The asteroid was at its nearest distance from the Earth at 23:28 GMT when it entered the orbit of the moon, about 322,000 kilometers from the planet. Thousands of professional and amateur astronomers tracked the asteroid with telescopes, seeking to learn more about its composition and how fast it spins and where it came from. According to a NASA spokesman, computer models simulating the asteroid's path show that there's no chance that it will hit Earth or the moon during the next 100 years.
一顆約略和航空母艦一般大小、如木炭般漆黑的小行星近距離掠過地球，但專家表明此顆小星球不會對我們地球或月球帶來威脅。 自1976年以來，這顆代號為“2005 YU55”的行星是最大的一顆近距離掠過地球的小行星，它的直徑約400米。格林尼治標(biāo)準(zhǔn)時間23:28，當(dāng)該小行星進(jìn)入月球運(yùn)行軌道時，和地球最近時僅32.2萬公里。 成千上萬的專業(yè)和業(yè)余天文學(xué)家通過望遠(yuǎn)鏡追蹤的此顆小行星,試圖了解更多關(guān)于它的成分、運(yùn)行時速,以及它的來源。 美國宇航局 (NASA)表示，通過計(jì)算機(jī)仿真小行星運(yùn)行路徑，顯示這顆小行星在未來100年內(nèi)都不可能撞擊地球或月球。