猎鹰9号火箭或将以音速七倍的速度撞击月球
天文学家预计，一艘2025年初发射的猎鹰9号火箭的上级段将在今年夏季撞击月球，预计撞击地点在月球近侧。
撞击预计在8月5日凌晨2:44（UTC 06:44）发生。
由于月球没有大气层，火箭的上级段（高13.8米，直径3.7米）将以完整状态撞击月球表面。
尽管此次撞击在北美和南美洲部分地区可观测，但预计将过于微弱，难以通过地面望远镜观测到。
天文学家对撞击物的身份高度确信，该物体是猎鹰9号火箭，其携带了Firefly的Blue Ghost和ispace的Hakuto-R两艘月球着陆器。
查看原文开头（英文 · 仅前 3 段）
Astronomers say the upper stage of a Falcon 9 rocket that launched in early 2025 will strike the Moon later this summer, likely on the near side of the Moon.
Bill Gray, who writes the widely used Project Pluto software to track near-Earth objects, has published a comprehensive report on the impact expected to occur at 2:44 am ET (06:44 UTC) on August 5. The Falcon 9 rocket’s upper stage is 13.8 meters (45 feet) tall and has a 3.7-meter (12 feet) diameter. Since the Moon has no atmosphere, it will strike the lunar surface intact.
Although the Moon will be visible to the eastern half of the US and Canada, and in much of South America, Gray said he believes the impact will probably be too faint to be seen by Earth-based telescopes.
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