新华社洛杉矶11月19日电（记者谭晶晶）美国航天局19日公布了由其探测器和空间望远镜拍摄的"星际 访客"——彗星3I/ATLAS的一批最新图像。这颗彗星预计将于12月19日前后飞掠地球，届时它与地球的 最近距离约2.7亿公里，约为地日距离的两倍。 研究人员认为，3I/ATLAS起源于太阳系外的一个恒星系统，在形成后被抛入星际空间，在数百万至数 十亿年的时间里一直在漂流，最近才进入太阳系。 这颗彗星的命名蕴藏着其"身份密码"。其中"ATLAS"代表它的发现者ATLAS研究团队；字母"I"代表"星 际"，说明它是来自太阳系外的天体；数字"3"表示它是第三个被确认的来自星际空间的天体。（完） 今年7月1日，美航天局资助的位于智利的"小行星撞击地球最后警报系统"（ATLAS）巡天望远镜首次发 现该天体。这是迄今被观测到的第三个造访太阳系的星际天体。此后，美航天局已有12台探测设备拍摄 到它，包括哈勃空间望远镜、詹姆斯·韦布空间望远镜、火星探测器等。随着该天体继续穿越太阳系， 预计还会有更多航天器继续捕捉其影像。 据介绍，今年秋季，彗星3I/ATLAS从距离火星约3000万公里处飞掠。当时美航天局3个火星探测器对其 进 ...

Market Overview - The three major U.S. stock indices experienced significant declines, with the Dow Jones dropping nearly 800 points, the Nasdaq falling by 2.3%, and the S&P 500 decreasing by over 1% due to intensified tech stock sell-offs, including Tesla which fell over 6% [1] - International precious metals futures generally closed lower, while U.S. oil's main contract rose by 0.19% to $58.6 per barrel [1] Federal Reserve Insights - Federal Reserve official Kashkari expressed opposition to the last rate cut and has not yet made a decision regarding the December meeting, emphasizing that inflation remains too high and the job market is under pressure [1] Corporate Actions - Verizon announced plans to lay off 15,000 employees, marking the largest workforce reduction in the company's history [1] - Pfizer reduced its stake in BioNTech by 54.7%, cashing out over $500 million [1] Space and Trade Developments - Blue Origin, owned by Jeff Bezos, successfully launched the "New Glenn" rocket carrying a Mars probe [1] - The U.S. announced tariff reductions on certain Latin American coffee imports to promote regional trade cooperation [1] Bond Market and Fund Assets - European bond yields rose collectively, with the UK 10-year government bond yield increasing by 3.9 basis points, as investors expressed skepticism about the Fed's rate cut outlook [1] - U.S. money market fund assets reached a record high of $7.54 trillion [1] Commodity Market - London base metals closed lower across the board, with LME tin dropping by 0.89%, while copper saw a slight increase of $12 to $10,956 per ton [1]

Core Points - Blue Origin successfully launched its reusable "New Glenn" heavy-lift rocket on December 13 at 15:55 ET, carrying a NASA Mars probe from Cape Canaveral Space Force Station in Florida [1] - This marks the second flight of the "New Glenn" rocket, with successful recovery of the first stage and boosters, indicating significant progress in cost reduction for Blue Origin [1] - The first flight of "New Glenn" occurred in January, where the second stage successfully reached orbit, but the first stage exploded during its return to Earth [1] - The second launch was initially planned for "late spring" but faced multiple delays [1]