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時間:2022-08-15 來源:本站 點擊:258次
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NASA's new space telescope reaches destination in solar orbit******

NASA's James Webb Space Telescope, designed to give the world an unprecedented glimpse of infant galaxies in the early stages of the universe, arrived at its gravitational parking spot in orbit around the sun on Monday, nearly a million miles from Earth.

With a final five-minute, course-correcting thrust of its onboard rocket, Webb reached its destination at a position of gravitational equilibrium known as the second Sun-Earth Lagrange point, or L2, one month after launch.

The thruster was activated by mission control engineers at the Space Telescope Science Institute in Baltimore, with radio signals confirming Webb was successfully "inserted" into its desired orbital loop around L2.

Webb will follow a special "halo" path that keeps it in constant alignment with Earth but out of its shadow, as the planet and telescope circle the sun in tandem. The L2 orbit within the larger solar orbit enables uninterrupted radio contact, while bathing Webb's solar-power array in non-stop sunlight.

Minimizing drift

By comparison, Webb's 30-year-old predecessor, the Hubble Space Telescope, orbits the Earth 547 kilometers away, passing in and out of the planet's shadow every 90 minutes.

The combined pull of the sun and Earth at L2 – a point of near gravitational stability first deduced by 18-century mathematician Joseph-Louis Legrange – will minimize the telescope's drift.

But ground teams will need to fire Webb's thruster briefly again about once every three weeks to keep it on track, Keith Parrish, the observatory's commissioning manager from NASA's Goddard Space Flight Center said.

Mission engineers are preparing next to fine-tune the telescope's primary mirror – 18 hexagonal segments of gold-coated beryllium metal measuring 6.5 meters across, far larger than Hubble's main mirror.

US reinstates 352 product exclusions from China tariffs******

The US Trade Representative's office said on Wednesday it will reinstate 352 expired product exclusions from US "Section 301" tariffs on Chinese imports.

The reinstated exclusions, initially granted by the Trump administration to provide certain sectors relief from the punitive tariffs on Chinese goods, had expired at the end of 2020. 

US Trade Representative Katherine Tai last October had launched a review to reinstate exclusions on a narrow list of 549 individual product categories.

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陕西省政协十二届五次大会开幕 刘国中赵一德马中平直到会祝贺******

智信众力谋出路,继续努力谱新篇。1月18日中午,市政协山西省第十二届委员会第五次大会在成都揭幕。

  陕西宾馆会议中心会堂内,看台上方的中国人民政治协商会议会徽灿然增辉,排序两边的十面红旗轿车光彩夺目。“紧密团结在以习近平同志为关键的中共中央周边,思想解放,创新发展,继续努力,全力铸就陕西省高质量发展新的篇章”,主会场悬架的长幅宣传语端庄而显眼。

  省政协主席韩勇意味着市政协山西省第十二届委员会常务委员委员会,向大会作工作报告。市政协党委书记徐新荣、副书记张广智,副书记李晓东、李冬玉、魏增军、杨冠军、王卫华、刘宽忍、王二虎和理事长闫超英在看台前座入座。大会由李晓东组织。

  省委副书记、省人大常委会负责人刘国中,省委副书记、代省长赵一德,全国人民代表大会农牧业和乡村委员会办公室主任马中平,省委常委李晓、王兴宁、庄长兴、王强、方红卫、李阳、程福波,省人大常委会办公室主任,省委广东省副省长,省高级法院医生,省人民法院检察长,别的副省级领导干部朋友和老同事,及其省十二届政协委员在看台入座。

  15时30分,大会按时逐渐,主会场内全体起立,豪壮的国歌声传遍礼堂。李晓东公布:中国人民政治协商会议山西省第十二届委员会第五次大会揭幕。

  大会最先根据了市政协山西省第十二届委员会第五次会议方案。

  韩勇在汇报中强调,刚以前的2021年,在中共陕西省委的坚强领导下,省十二届市政协以及常务委员委员会坚持不懈以习近平新时期社会主义民主社会主义经济观念为具体指导,努力学习贯彻落实中国共产党十九金刚级十九届各次全会精神,深层次学习贯彻习总书记来陕调查重要批示重要指示,推进贯彻落实中间市政协事情会议精神,团结一致领着整体人大代表和参与人民政协的各政党团队、各族人民社会各界,积极主动建言献策咨政、推动“十四五”优良比赛,普遍凝聚共识、共庆我党建立一百周年,为全力铸就陕西省高质量发展新的篇章做出主要奉献。

  韩勇注重,2022年是进到全方位建设社会主义智能化国家、向第二个近百年长远目标涉足新的征程的关键一年,也是这届市政协的全面铺开。市政协将进一步强化理论修养,把坚持不懈“2个建立”、保证“两个维护”反映到市政协工作中整个过程、各层面。充分运用人民政协在国家治理体系中的功效和效率,对焦铸就陕西省高质量发展新的篇章,思想解放、创新发展、继续努力,充分发挥专业商议组织关键功效,提升政治协商会议、协商民主、参政议政水准。一直坚持大团结大协同,紧紧围绕“人心是较大的政冶,的共识是拼搏的驱动力”,充分运用人民政协“关键阵营”“关键服务平台”“关键方式”功效,掌握人心民声,更强凝聚共识,以优异的成绩迎来我党第二十次全国各地意味着大会获胜举办。

  受十二届省政协常委会授权委托,李冬玉向大会汇报了市政协十二届四次会议至今提议工作情况。

  省纪委、省委部门和相关领域的负责同志列席。 华商报新闻记者 粗心大意振 拍摄 杜静波。


Colin Powell dies of Covid******

Colin Powell, the first black secretary of state who saw his legacy tarnished when he made the case for war in Iraq in 2003, has died from complications from COVID-19. He was 84.

"We have lost a remarkable and loving husband, father, grandfather and a great American," the family said in a statement posted to social media yesterday.

The retired four-star general and former chairman of the Joint Chiefs of Staff who served four presidents made his reputation as a man of honor distant from the political fray – an asset in the corridors of power.

After the 1991 Gulf War he was so widely respected that he was even touted as a future president of the United States, but ultimately he never ran for the White House.

"General Powell is an American hero, an American example, and a great American story," George W. Bush said as he announced the nomination of Powell, the son of Jamaican immigrants, who became the Republican president's secretary of state in 2000.

"In directness of speech, his towering integrity, his deep respect for our democracy, and his soldier's sense of duty and honor, Colin Powell demonstrates ... qualities that will make him a great representative of all the people of this country."

But he found it hard to live down his infamous February 2003 speech to the United Nations Security Council about the alleged existence of weapons of mass destruction in Iraq – evidence which was later proven to be false.

"It's a blot ... and will always be a part of my record. It was painful. It's painful now," Powell said in a 2005 interview with ABC News.

Tributes nevertheless poured in from Congress, where Democratic Senator Mark Warner praised Powell as "a patriot and a public servant," while House Republican Peter Meijer described him as a rarity in the modern age: "a true soldier statesman."

The family statement said Powell had been fully vaccinated.

Born April 5, 1937 in Harlem, Powell's "American Journey" – the title of his autobiography – started in New York, where he grew up and earned a degree in geology.

He also participated in the Reserve Officers' Training Corps in college, and upon his graduation in June 1958, he received a commission as a second lieutenant in the US Army, and was posted in what was then West Germany.

Powell completed two tours of duty in Vietnam – in 1962-1963 as one of John F. Kennedy's thousands of military advisers, and again in 1968-1969 to investigate the My Lai massacre.

He earned a Purple Heart.

But he also faced questions about the tone of his report into the hundreds of deaths at My Lai, which to some seemed to dismiss any claims of wrongdoing.

8月9日,北京地铁二号线翻入轨道乘客已身亡

1.美媒:许多印度消费者仍对中国手机保持忠诚

2.巴基斯坦一安全检查站遭武装分子袭击

3. Tencent

4.中年妈妈若想穿出好气色 建议多穿这些彩色系

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