On April 5, 2019, the Hayabusa2 probe, operated by Japan's space agency JAXA, deployed an impactor that launched a 2 kg copper disk at 2 kilometers per second toward the asteroid Ryugu. The resulting crater was about 14.5 meters in diameter, nearly twice the size predicted by scientists before the experiment. The impactor, called SCI, was a compact device that used an explosive charge to propel the copper disk at high speed. Before hitting the surface of Ryugu, the disk transformed into a cone shape with a diameter of about 30 centimeters. After the impact, Hayabusa2 moved to a safe position behind the asteroid, while a small camera named DCAM3 recorded the event. The probe returned to the site 20 days later, on April 25, 2019, to assess the changes caused by the experiment. Scientists observed that a 20-meter-wide area had been significantly altered by the impact. A study published in the journal Science confirmed that the crater measured approximately 14.5 meters in diameter, nearly double the initial theoretical predictions. Researchers discovered that the oversized crater was not due to the speed or mass of the projectile, but rather the extremely low cohesion of Ryugu's surface. Ryugu is composed of unconsolidated fragments that have reaccumulated over time, likely after a past catastrophic event. This structure changes the physics of the impact. On such loose material, the energy from the impact does not break the surface as it would on solid rock like granite. Instead, it pushes the grains of material against each other, similar to throwing a stone into dry sand rather than concrete. This phenomenon allowed scientists to confirm that the impact occurred in a regime dominated by gravity, not by the material's resistance, which explains the crater's unusually large size. This operation marked the first global controlled artificial collision experiment with an asteroid, according to JAXA. The experiment provided valuable data for those studying how to protect Earth from potentially dangerous celestial objects. Even today, scientists continue to refine their understanding of this crater, as traditional models are insufficient to describe the impact regime in such a low-gravity, near-zero-resistance environment. The Japanese experiment has opened an entirely new field of research, reminding us that even the most unassuming objects can reveal surprising insights when studied in detail.