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'NASA ready to take whatever Universe throws at us'_我的网站

A |     祥蛇纳福，     新岁将至。    Washington, Oct 12 (UNI) American space agency NASA says its recent attempt to deflect the path of an asteroid was successful, after its Dart probe struck an asteroid head-on.
Scientists have now confirmed the orbit of a 160m-wide space rock known as Dimorphos was altered when the Dart probe struck it head on last month.
Researchers came to the conclusion after making measurements using a range of space and Earth-based telescopes.
The mission was conceived to test a potential strategy to defend the Earth against threatening objects.
Dart's achievement proves such an idea would work, provided it was initiated early enough and the target wasn't overly massive.
"This mission shows that Nasa is trying to be ready for whatever the Universe throws at us," said agency administrator Bill Nelson.
"I believe that Nasa has proven that we are serious as a defender of the planet," he told reporters.
The space agency released a raft of data on Tuesday to support its assessment, including new pictures from the Hubble Space Telescope and from a small Italian spacecraft that stood off from the impact by about 50km (30 miles).
The Double Asteroid Redirection Test (Dart) took place some 11 million km (7 million miles) from Earth.
It saw the refrigerator-sized Nasa satellite drive straight into Dimorphos at 22,000km/h (14,000mph), destroying itself in the process.
The space rock orbits a much larger (780m wide; 2,550ft) object called Didymos. Before impact, the time taken for Dimorphos to make one circuit of its sibling was 11 hours and 55 minutes.
The telescope evidence now indicates this orbital period has been reduced to 11 hours and 23 minutes - a change of 32 minutes. This corresponds to Dimorphos moving closer into to Didymos by "tens of metres".
Nasa had defined a minimum successful period change of Dimorphos of 73 seconds or more. The results released on Tuesday show Dart surpassed this benchmark by more than 25 times.
"This is a 4 percent change in the orbital period of Dimorphos around Didymos. Dart just gave it a small nudge. But if you wanted to do this in the future, you'd want to do it years in advance," commented Nancy Chabot from the Johns Hopkins University Applied Physics Laboratory, which led the mission for Nasa.
"Warning time is really key here in order to enable this sort of asteroid deflection to be used in the future as part of a much larger planetary defence strategy."
Nasa's Dart programme scientist, Tom Statler, also had a word of caution about drawing too many conclusions from the experiment.
Asteroids came in many different guises, he said. Their compositions and constructions were diverse - something that was being emphasised every time a mission visited a new object.
"We should not be too eager to say one test on one asteroid tells us exactly how every other asteroid would behave in a similar situation," he stressed.
"But what we can do is use this test as an anchor point for our physics calculations in our simulations that tell us how different kinds of impacts in different situations should behave."
Four years from now, the European Space Agency (Esa) will have three spacecraft - collectively known as the Hera mission - at Didymos and Dimorphos to make follow-up studies.
UNI ING。    在这辞旧迎新的美好时刻，我们的学校也被欢乐与期待填满，一场精彩纷呈的新年联欢会盛大启幕，宛如一幅绚丽多彩的画卷，在祥蛇纳福的旋律中，徐徐展开童趣盎然的华篇。          HAPPY NEW YEAR                              翰墨飘香 联韵寄情                              春联，是新年独特的文化符号。

B | 校园里翰墨飘香，一场别开生面的春联书法展示吸引了众人目光。师生们齐聚一堂，挥毫泼墨，笔走龙蛇间，一个个刚劲有力、飘逸灵动的书法字跃然纸上。“祥蛇纳福迎新年，瑞气盈门映笑颜”等一幅幅饱含美好祝愿的春联，不仅展现了深厚的书法造诣，更传递出对新年的憧憬与期待。孩子们红扑扑的脸蛋上洋溢着专注与兴奋，他们在传统文化的滋养中，感受着笔墨纸砚的独特魅力，用稚嫩却认真的笔触，书写着对未来的无限向往。                             光影贺岁 共鉴新景                              师生们齐聚一堂，通过视频回顾这一年的精彩活动瞬间，视频中洋溢着孩子们的欢声笑语。随后，大家一同观看贺岁短片。大屏幕亮起，一段段精彩的画面将大家带入了充满欢乐与温情的新年世界。短片里，小歌唱家们引吭高歌，清脆悦耳的歌声如潺潺溪流，流淌着新年的喜悦与希望；小演员们表情丰富，表演生动，把一个个小故事演绎得扣人心弦。小观众们的眼睛里闪烁着好奇与快乐的光芒，他们时而因幽默的情节捧腹大笑，时而被温馨的场景深深打动。

C | 在这光影交错的时刻，大家共同领略着新年的多元魅力，也在心底默默种下了对新一年的美好种子。

D |                    才艺荟萃 童星闪耀                              才艺展示环节将联欢会的气氛推向了高潮。舞台上，同学们各显神通，宛如一颗颗璀璨的童星闪耀光芒。

E | 歌声悠扬悦耳，一曲《新年好》唱出了孩子们内心的喜悦与对新年的期盼；舞蹈活力四射，欢快的节奏带动着全场的气氛，仿佛祥蛇舞动，带来勃勃生机；乐器演奏精彩纷呈，清脆的钢琴声、激昂的架子鼓声交织在一起，奏响了新年的华丽乐章。还有幽默风趣的小品表演，小演员们惟妙惟肖的表演让台下观众笑声不断，掌声雷动。每一个节目都凝聚着孩子们的努力与热情，展现出他们丰富多彩的才艺和无限的创造力。         HAPPY NEW YEAR          祥蛇纳福，为校园披上了节日的盛装；童趣盎然，让新年充满了希望与活力。这场新年联欢会，不仅是一场视听盛宴，更是孩子们成长路上的珍贵记忆。

F | 愿在新的一年里，孩子们带着这份欢乐与梦想继续前行，在知识的海洋里畅游，在生活的舞台上绽放更绚烂的光彩。让我们共同期待，未来的日子里，校园里会奏响更多美妙的乐章，书写更多动人的篇章！                                        END                              文稿撰写：董雅倩     图片素材：信息组     页面排版：周琳 陈彬彬          文字编审：张娟          责任编审：蔡媛媛                                        新          年          快          乐          【官方订阅号】                                        【官方视频号】。

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Published on:07:46:50