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

一 |     每日商报讯 当七夕佳节遇上西湖月夜，有着“爱情之都”美誉的杭州将会书写怎样的浪漫？昨天，西子湖畔再迎盛事——“一见倾心西湖情 和美七夕共良辰”第28届（2026）中国国际西湖情五粮液玫瑰婚典七夕盛会如约启幕，77对有情人以湖山为证，共赴一场七夕浪漫之约。    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。

二 | “在公众号看到了活动招募的信息，抱着试一试的心态报名，没想到真的入选了，特别激动。”站在西湖的爱心船前，徐佳骞和男友陈磊掩饰不住地开心。这是两人第一次在杭州过七夕，谈及对这座城市的印象，陈磊直言非常幸运：“西湖边有许多动人的爱情故事，在这里和70多对情侣一起度过这样一个有意义的日子，我感觉幸福具象化了。”夜幕降临，西子湖早已被爱意笼罩。77对有情人登上77艘2026五粮液玫瑰婚典七夕盛会专属“西湖同心船”，在夜幕西湖中相依相偎、互诉心声，沿途欣赏西湖断桥、城隍阁、雷峰塔、保俶塔等杭城地标的绝伦夜景，品味千年爱情之都杭州的浪漫底蕴。77艘缀满爱意的同心船漂荡在西子湖面，汇聚成一条蜿蜒流动的爱情星河，尽显杭城独有的柔美缱绻。当77艘“西湖同心船”缓缓漾至湖心，震撼梦幻的西湖音乐喷泉惊艳绽放，瞬间点燃了现场气氛。水上舞台同步上演《梁祝》《白蛇传》《牛郎织女》及七仙女送祝福等舞蹈节目，水舞交融间将中式浪漫的温柔和缱绻传遍每一处。

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