彗星狠撞木星　撞出地球大小凹洞 TVBS 更新日期:2009/07/22 22:31 林佳璇 原新聞網址：http://tw.news.yahoo.com/article/url/d/a/090722/8/1nkl5.html 太陽系中最大的行星-木星，最近外表出現了一個巨大的凹洞！一名澳州業餘天文學家， 拍到木星南極的大氣層，有一個明顯的撞擊痕跡，根據估算，這個大凹洞大概有一個 地球這麼大，研判是遭到巨大彗星衝撞，距離上一次彗星撞木星，已經有15年之久， 天文專家正在研究，這次的撞擊會對木星產生多大影響。 半夜1點鐘不睡覺，澳洲人威斯利以業餘天文學家的身份，發現了連NASA都不知道的 大新聞，木星遭到巨大彗星衝撞，而且還撞出了一個大凹洞！業餘天文學家 威斯利：「我是在我的電腦螢幕上看到的，當時我正要拍木星的畫面，時間是凌晨1點， 平常我是個木星攝影師。」 真的是好眼力，這張照片就是威斯利拍到的照片，一般觀測者看不出來，其實在 這個地方，也就是木星南極的大氣層，有一個明顯的撞擊痕跡，美國太空總署接獲通報後 ，也用紅外線望遠鏡觀測，研判可能是被慧星給撞出來的，這個凹泂大小有 一個地球這麼大！威斯利：「木星的融合反應可是大的多，這個小點對木星來說， 不會造成任何損傷。」 不用擔心木星被撞成瘀青，因為木星的體積有1300個地球大，體格好的很， 其實木星不只15年前曾經被小慧星撞上，2003年，美國發射的伽利略無人太空梭， 也曾對木星進行自殺攻擊！ 當年無人太空梭衝撞木星充滿阿摩尼亞的外氣層，就好像丟入鹽酸一樣， 立刻自我毀滅；這回慧星撞木星，讓這麼遠的木星，都看的到多了一塊大凹洞 ，可見彗星撞擊威力不小。 ........................................... NASA網站也公布了這項新聞並以哈柏望遠鏡觀測之。 這則有用哈柏拍的照片 http://www.nasa.gov/mission_pages/hubble/main/jupiter-hubble.html 該則新聞的原文報導： This Hubble picture, taken on July 23, by the new Wide Field Camera 3, is the sharpest visible-light picture taken of the atmospheric debris from a comet or asteroid that collided with Jupiter on July 19. This is Hubble's first science observation following its repair and upgrade in May. The size of the impactor is estimated to be as large as several football fields. Image Credit: NASA, ESA, and H. Hammel (Space Science Institute, Boulder, Colo.), and the Jupiter Impact Team View Larger Image NASA's Hubble Space Telescope has taken the sharpest visible-light picture yet of atmospheric debris from an object that collided with Jupiter on July 19. NASA scientists decided to interrupt the recently refurbished observatory's checkout and calibration to take the image of a new, expanding spot on the giant planet on July 23. Discovered by Australian amateur astronomer Anthony Wesley, the spot was created when a small comet or asteroid plunged into Jupiter's atmosphere and disintegrated. The only other time such a feature has been seen on Jupiter was 15 years ago after the collision of fragments from comet Shoemaker-Levy 9. "Because we believe this magnitude of impact is rare, we are very fortunate to see it with Hubble," said Amy Simon-Miller of NASA's Goddard Space Flight Center in Greenbelt, Md. "Details seen in the Hubble view shows a lumpiness to the debris plume caused by turbulence in Jupiter's atmosphere." astronauts was a big success. "This image of the impact on Jupiter is fantastic," said U.S. Sen. Barbara A. Mikulski, D-Md., chairwoman of the Commerce, Justice and Science Appropriations Subcommittee. "It tells us that our astronauts and the ground crew at the Goddard Space Flight Center successfully repaired the Hubble telescope. I'm so proud of them and I can't wait to see what's next from Hubble." For the past several days, Earth-based telescopes have been trained on Jupiter. To capture the unfolding drama 360 million miles away, Matt Mountain, director of the Space Telescope Science Institute in Baltimore, gave observation time to a team of astronomers led by Heidi Hammel of the Space Science Institute in Boulder, Colo. "Hubble's truly exquisite imaging capability has revealed an astonishing wealth of detail in the impact site," Hammel said. "By combining these images with our ground-based data at other wavelengths, our Hubble data will allow a comprehensive understanding of exactly what is happening to the impact debris." Simon-Miller estimated the diameter of the impacting object was the size of several football fields. The force of the explosion on Jupiter was thousands of times more powerful than the suspected comet or asteroid that exploded over the Siberian Tunguska River Valley in June 1908. The image was taken with the Wide Field Camera 3. The new camera, installed by the astronauts aboard space shuttle Atlantis in May, is not yet fully calibrated. While it is possible to obtain celestial images, the camera's full power has yet to be seen. "This is just one example of what Hubble's new, state-of-the-art camera can do, thanks to the STS-125 astronauts and the entire Hubble team," said Ed Weiler, associate administrator of NASA's Science Mission Directorate in Washington. "However, the best is yet to come." --

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