美国国家航空航天局（NASA）的“旅行者1号”探测器发射于49年前，预计将于11月18日达到一个里程碑：届时它将距离地球160.9亿英里（258.9亿公里），意味着它将跨越“一光日”距离标记。在这个距离上，光在“旅行者1号”与地球之间传播需要24小时，相当于一光日。作为人类制造的最远飞行物体，该探测器飞行速度为每小时2.8万英里。
NASA’s Voyager 1, launched 49 years ago, is expected to reach a milestone on November 18, when it will be 16.09 billion miles (25.89 billion kilometres) from Earth, meaning it will cross the one-light-day distance mark. At that distance, light takes 24 hours to travel between Earth and the spacecraft, the equivalent of one light-day. The farthest human-made object in space, the probe is travelling at a speed of 28,000 mph.
它也是首个进入星际空间的航天器，于2012年8月抵达，其孪生探测器“旅行者2号”于2018年12月紧随其后。“旅行者1号”因拍摄了标志性的“淡蓝小点”地球照片而闻名，它将于11月18日飞越约160.9亿英里的距离，到达一光日标记。关于NASA“旅行者1号”和“旅行者2号”的一切NASA的“旅行者1号”和“旅行者2号”于1977年发射，利用了木星、天王星、土星和海王星——太阳系中最大的四颗行星——每175年出现一次的行星排列。
It was also the first spacecraft to enter interstellar space in August 2012, closely followed by its twin, Voyager 2, in December 2018. Known for taking the iconic “Pale Blue Dot” photograph of Earth, Voyager 1 would have crossed a distance of roughly 16.09 billion miles on November 18 to reach the one light-day mark. All about NASA's Voyager 1 and 2NASA's Voyager 1 and 2 were launched in 1977, taking advantage of a once-every-175-year planetary alignment of Jupiter, Uranus, Saturn, and Neptune - the four largest planets in our solar system.
到了20世纪80年代，两艘探测器在土星附近分道扬镳。“旅行者2号”继续飞向天王星和海王星，而“旅行者1号”则朝着距离地球17光年多的一颗恒星——格利泽445飞去。“旅行者2号”仍然是唯一一艘近距离探测过太阳系全部四大巨型行星——木星、土星、天王星和海王星——的航天器。作为首个飞越天王星和海王星的人造物体，它在木星发现了第14颗卫星。
By the 1980s, the two went their separate ways at Saturn. Voyager 2 continued to travel towards Uranus and Neptune, while Voyager 1 headed towards a star, Gliese 445, more than 17 light-years away from Earth. Voyager 2 remains the only spacecraft to have explored all four giant planets of our solar system-Jupiter, Saturn, Uranus, and Neptune-at close range. The first human-made object to fly past Uranus and Neptune, it discovered a 14th moon at Jupiter.
此外，它在天王星发现了10颗新卫星和两个环，在海王星发现了五颗卫星、四个环和一个“大黑斑”。这艘孪生探测器将在九年后，即2035年11月跨越“一光日”标记。“金唱片”两艘“旅行者”探测器都携带了一张“金唱片”，这是一张12英寸的留声机唱片，旨在代表人类和地球上的生命。每张唱片包含55种语言的口语问候、27首音乐作品、116张图像，以及一系列地球声音的集合。
Additionally, it found 10 new moons and two rings at Uranus, and five moons, four rings and a “Great Dark Spot” at Neptune. The twin probe will cross the one “light-day” mark after nine years, in November 2035.A 'Golden Record'Both Voyager spacecrafts carry a Golden Record, a 12-inch phonograph disc designed to represent humanity and life on Earth. Each record contains spoken greetings in 55 languages, 27 musical selections, 116 images, and a collection of sounds from Earth.
这张唱片被封装在一个保护罩内，罩上刻有图示，标明太阳相对于14颗脉冲星的位置，并附有说明如何播放唱片的指引。为防止太空辐射损坏内容，唱片采用镀金铜制成，而保护罩则由铝制成。“旅行者1号”失联两天“旅行者1号”在10月连续两天未与任务控制中心联络，引发恐慌。深空网在10月18日和19日均未收到探测器的信号。然而，工程师尚未发送指令排查故障，航天器便于10月20日恢复通信并回传信号。此后未再报告通信中断情况。
The record is enclosed in a protective cover engraved with diagrams indicating the position of our Sun relative to 14 pulsars, along with instructions explaining how to play the disc. To preserve its contents against the radiations of space, the record was made of copper with gold plating, while its protective cover was constructed from aluminium. Voyager 1 went incommunicado for 2 daysVoyager 1 didn't call mission control for two days in October, setting off alarms of panic. The Deep Space Network didn't receive a signal from the probe on October 18, and 19. However, before engineers could send commands to troubleshoot the issue, the spacecraft re-established communication on October 20 and signalled back. No further communication disruptions have been reported since then.