当地时间7月10日，张帅（右）和梅尔滕斯在颁奖仪式上 供图/视觉中国北京时间7月11日凌晨，在2022温网女双决赛中，张帅搭档梅尔滕斯2比6、4比6不敌2号种子克莱奇科娃/西尼亚科娃组合，张帅无缘赢得首个温网女双冠军，也未能获得个人的第三个大满贯冠军。    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。不过，在赛后的颁奖仪式，张帅在致辞中说：“第一次打进温网决赛，对我来说真的非常特别。谢谢埃莉斯带我进了中央球场。

B | 祝贺芭芭拉和卡特琳娜，你们打得棒极了。希望下次我们还能来到这里比赛。”对于张帅来说，网球依然特别，依然值得去打个昏天黑地。

C | 来到33岁，张帅像是把自己翻了新的一页。

D | 在当今的女子网坛，张帅成了一个特殊的存在。本赛季，张帅虽然成绩不是最出色的那一个，却一定是人缘最好的一个。从红土赛季开始，张帅在每站比赛都和新的选手组成搭档征战双打。从法网到温网的混双比赛，用张帅的话说，男选手排着队来邀请她打混双。

来到33岁，张帅原本也将自己归类于再打不动球的老球员一类。在今年草地赛季伯明翰站，张帅在单打和双打两线作战，全部杀入决赛。在最后因体能耗尽无缘继续参赛后，张帅自嘲，自己作为33岁中国老阿姨，有些打不动了。这时她的对手，巴西选手玛雅说，“不，张帅，你是我见过最有活力的球员。” 从前的张帅，没有如今活得这般明白和通透。如今的她不再为了一个击球是好球还是坏球与裁判较劲儿，也不再为自己设立哪个球员当假想敌。如今的张帅只想不断地探索这个网球世界，利用有限的时间去取得更多的成就。今年温网，张帅再次获得了这个机会。

E | 在单打赛场，张帅连赢两轮，最终以32强结束单打赛事。

F | 在双打赛场，张帅和梅尔滕斯作为本届温网女双头号种子，向新的成就发起冲击。用张帅的话说，她此前还没能在温网的中心球场打一场双打半决赛。今年温网期间，张帅用实力实现自己的愿望。此前四轮，张帅组合不失一盘战胜对手打入决赛。2号种子克莱奇科娃/西尼亚科娃搭档时间很久配合默契，两人自2018年开始获得四次大满贯女双冠军，包括两次法网、一次温网和一次澳网。面对如此强劲的组合，张帅想要第三次问鼎大满贯女双冠军难度不小。最终张帅/梅尔滕斯两盘不敌状态更好的克莱奇科娃/西尼亚科娃获得亚军。对于张帅来说，职业网坛不仅没有变得如职场般熟悉又麻木，而且还翻开一页页新的篇章。本届温网张帅收获颇丰，打到单打32强和女双亚军的她获得25.5万英镑的奖金。

G | 在排名方面，张帅高居女双世界第二，有望本赛季成为世界第一。33岁的张帅仍在不断前行。

H | 文/本报记者 褚鹏