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 原新闻网址：http://tw.news.yahoo.com/article/url/d/a/090722/8/1nkl5.html 太阳系中最大的行星-木星，最近外表出现了一个巨大的凹洞！一名澳州业余天文学家， 拍到木星南极的大气层，有一个明显的撞击痕迹，根据估算，这个大凹洞大概有一个 地球这麽大，研判是遭到巨大彗星冲撞，距离上一次彗星撞木星，已经有15年之久， 天文专家正在研究，这次的撞击会对木星产生多大影响。 半夜1点钟不睡觉，澳洲人威斯利以业余天文学家的身份，发现了连NASA都不知道的 大新闻，木星遭到巨大彗星冲撞，而且还撞出了一个大凹洞！业余天文学家 威斯利：「我是在我的电脑萤幕上看到的，当时我正要拍木星的画面，时间是凌晨1点， 平常我是个木星摄影师。」 真的是好眼力，这张照片就是威斯利拍到的照片，一般观测者看不出来，其实在 这个地方，也就是木星南极的大气层，有一个明显的撞击痕迹，美国太空总署接获通报後 ，也用红外线望远镜观测，研判可能是被慧星给撞出来的，这个凹泂大小有 一个地球这麽大！威斯利：「木星的融合反应可是大的多，这个小点对木星来说， 不会造成任何损伤。」 不用担心木星被撞成瘀青，因为木星的体积有1300个地球大，体格好的很， 其实木星不只15年前曾经被小慧星撞上，2003年，美国发射的伽利略无人太空梭， 也曾对木星进行自杀攻击！ 当年无人太空梭冲撞木星充满阿摩尼亚的外气层，就好像丢入盐酸一样， 立刻自我毁灭；这回慧星撞木星，让这麽远的木星，都看的到多了一块大凹洞 ，可见彗星撞击威力不小。 ........................................... NASA网站也公布了这项新闻并以哈柏望远镜观测之。 这则有用哈柏拍的照片 http://www.nasa.gov/mission_pages/hubble/main/jupiter-hubble.html 该则新闻的原文报导： 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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