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哈密市博爱附件炎
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发布时间: 2025-05-23 22:13:11北京青年报社官方账号
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Jupiter and Saturn, the two largest planets in the Solar System, were stationed in nearly the same spot in the night sky on Monday, creating a bright spectacle.The positions of the two planets align once every 20 years, according to NASA. While conjunctions happen several times during the course of a typical lifetime, a conjunction of this magnitude is quite rare. The last time the two planets were this close to each other in the night sky was 400 years ago, but no one was able to see it as that conjunction occurred during the day.The last time a conjunction of his magnitude happened at night was 800 years ago.So what causes the conjunction?“You can imagine the solar system to be a racetrack, with each of the planets as a runner in their own lane and the Earth toward the center of the stadium,” said Henry Throop, astronomer in the Planetary Science Division at NASA Headquarters in Washington. “From our vantage point, we’ll be able to be to see Jupiter on the inside lane, approaching Saturn all month and finally overtaking it on December 21.”The timing of the conjunction adds to the spectacle. Monday also marks the winter solstice.Being four days before Christmas, some are dubbing the event as “The Christmas Star,” although the conjunction is of planets and not stars. Scientists have long speculated whether the Star of Bethlehem was the 7 BC conjunction of the two planets.“Conjunctions like this could happen on any day of the year, depending on where the planets are in their orbits,” said Throop. “The date of the conjunction is determined by the positions of Jupiter, Saturn, and the Earth in their paths around the Sun, while the date of the solstice is determined by the tilt of Earth’s axis. The solstice is the longest night of the year, so this rare coincidence will give people a great chance to go outside and see the solar system.”While the two planets will have the appearance of being very close to each other, in reality, they will be hundreds of millions of miles apart.For the next few days, Saturn and Jupiter will remain very close to each other in the night sky. The best time to view the planets will be roughly one hour after sunset in the southwest sky. Jupiter will appear to be brighter than Saturn as its closer and larger. 2278

  哈密市博爱附件炎   

Johnson & Johnson announced it has paused its coronavirus vaccine trials on Monday following an “unexplained illness” among one of its participants.Johnson & Johnson stressed that adverse events during trials are expected, and a pause gives researchers an opportunity to review all of the medical information before moving forward with the trial. Johnson & Johnson added that it’s not always immediately known if the affected person received a placebo or a study treatment.Among the trials paused was Johnson & Johnson’s multi-country “ENSEMBLE” vaccine, which entered Phase 3 testing in September. Johnson & Johnson said last month that its goal was to seek an emergency use authorization approval in early 2021.The FDA noted that a vaccine candidate must be at least 50% effective to receive emergency use authorization. Vaccine candidates should include a median follow-up duration of at least two months after completion of the full vaccination regimen to help provide adequate information to assess a vaccine’s risk-benefit.According to the FDA, a typical Phase 3 trial would take one to three years.“NIH is committed to supporting several Phase 3 vaccine trials to increase the odds that one or more will be effective in preventing COVID-19 and put us on the road to recovery from this devastating pandemic,” said NIH Director Francis S. Collins, M.D., Ph.D. “We also know that preventing this disease could require multiple vaccines and we’re investing in those that we believe have the greatest potential for success.” 1554

  哈密市博爱附件炎   

Jill and I send our thoughts to President Trump and First Lady Melania Trump for a swift recovery. We will continue to pray for the health and safety of the president and his family.— Joe Biden (@JoeBiden) October 2, 2020 229

  

John Thompson, the first Black man to coach a college basketball team to an NCAA championship and longtime fixture at Georgetown University, has died. He was 78 years old.Thompson's family confirmed the Hall of Famer's death in a statement released by Georgetown University on Monday."We are heartbroken to share the news of the passing of our father, John Thmopson, Jr. Our father was an inspiration to many and devoted his life to developing young people not simply on, but most importantly, off the basketball court," the family's statement read. "He is revered as a historic shepherd of the sport, dedicated to the welfare of his community above all us."Thompson, a Washington, D.C. native, played college basketball at Providence College in the 1960s before a brief NBA career with the Boston Celtics, where he won two championships. 846

  

KANSAS CITY, Mo. — A former U.S. Secret Service agent who worked on a presidential detail for the late George H.W. Bush reminisced about the 41st president of the United States on Saturday after learning of Bush's passing.Mauri Sheer spent two years with the Bush family during his presidency before he was appointed as a U.S. Marshal in the Kansas City area. Sheer, who worked in the Secret Service for nearly three decades, served six presidents."From Gerald Ford through George W. Bush," Sheer said.But it was his time with George H.W. Bush, who died Friday night at his home in Texas, that he thought about most this weekend."He was constantly moving, and when he would move, he would move fast," Sheer said. "If you were working right ahead of him in the perimeter around him and you were right ahead of him, you'd have to be careful if you slowed down because he'd run you right over."Sheer said that same energy went into his golf game. "They say he played golf almost like you play hockey," Sheer said. "He'd hit the ball and the ball's almost done moving and he's just constantly moving."Sheer said the moment he'd never forget was the day Ronald Reagan was released from the hospital after he'd been shot. Sheer said he and Bush were running a 10-kilometer race that morning. "He didn't run as fast as he thought he was going to and he was pressed for time and he was behind and he was afraid he was going to miss it," Sheer said.As usual, Bush didn't miss a beat.Sheer said that's one thing he'll always remember. He also wanted others to know Bush was a fundamentally good person."The main thing that I think people should know about George H.W. Bush is that he's one of the most decent guys I'd ever been around," Sheer said.He also will remember Bush as a generous man who cared deeply about others.During the holiday season, Sheer said Bush would plan his schedule around his agents, so they could be home with their families for the holidays. 2001

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