Falcon 9 Stage to Strike Moon at 2:35 a.m. ET Wednesday

A spent Falcon 9 upper stage is on course to hit the lunar surface at 2:35 a.m. ET on August 5, adding another human-made crater to a body already marked by nearly 70 prior impacts since Luna 2 in 1959. The event offers a chance to measure ejecta behavior and subsurface exposure on an airless world while highlighting the growing inventory of orbital debris that can escape controlled reentry.

The stage launched January 15, 2025, from Kennedy Space Center pad 39A carrying Firefly Aerospace’s Blue Ghost lander, which touched down successfully on March 2, 2025, and ispace’s Resilience lander, which crashed on June 5 after a laser range-finder failure. After separation the stage was expected to enter a decaying Earth orbit but instead remained in a path that brought it repeatedly closer to the Moon. NASA’s Center for Near-Earth Object Studies confirmed the trajectory using public tracking data; the object travels at 2.43 km/s and carries roughly 45 tons of mass, mostly empty tank structure.

Impact energy estimates reach the equivalent of three tons of TNT, enough to loft a dust plume potentially 50 km high and spreading laterally more than 180 km according to models posted on arXiv. Astronomer Bill Gray projects a crater exceeding 50 feet across. NASA’s Lunar Reconnaissance Orbiter imaged the site July 29 and will return August 12 for before-and-after comparisons. South Korea’s Danuri probe and ground telescopes in the Americas are also positioned to record the flash and plume; a citizen-science campaign is recruiting amateurs to capture video.

No risk exists to Earth. NASA spokesperson Jimi Russell stated the agency will continue tracking the booster for training and will study the fresh crater for scientific data on lunar regolith and impact physics. Cambridge astronomer Matt Bothwell noted the plume could be visible through large telescopes and described the event as a live demonstration of how debris behaves without atmospheric drag.

The European Space Agency reports more than 54,000 objects larger than 10 cm now orbit Earth, with 17,000 tonnes of material launched since 1957. A prior uncontrolled lunar impact occurred in 2022 when a Chinese Long March 3C stage from the Chang’e 5-T1 mission struck the far side. Apollo-era Saturn V stages were deliberately crashed to generate seismic signals; the coming strike supplies a similar calibration opportunity without prior planning.