Space Data, Inc. (Headquarters: Minato-ku, Tokyo; President and CEO: Koyo Sato; hereinafter "Space Data") is pleased to announce that a paper authored primarily by Dr. Ryuki Hyodo (concurrently a university faculty member in planetary science/AI science), Chief Science Officer (CSO), was published online in the international academic journal "Earth and Planetary Science Letters" on June 20, 2026. This research focuses on the phenomenon of "hypervelocity impacts," which occur universally in space, and uses world-class 3D impact simulations to visualize and analyze in detail the process of hypervelocity collisions between rocky micrometeoroids and icy celestial bodies at speeds of 30 km/s. The results revealed that the porosity (degree of internal void space) of both the impactor (meteoroid) and the target significantly influences the crater formation process and the extent of heating and vaporization caused by the impact. ■ Background: The Ubiquitous Phenomenon of "Hypervelocity Impacts" in Space Celestial impacts are one of the most fundamental phenomena in the universe, gradually reshaping the topography, composition, and thermal state of planetary surfaces over time. In particular, the solar system is filled with countless "micrometeoroids" derived from asteroids, comets, and Kuiper Belt Objects – "cosmic dust" ranging from a few microns to sub-millimeters in size. In the outer solar system, micrometeoroids drawn by the strong gravity of planets collide at hypervelocities of 10-100 km/s with the surfaces of bodies such as rings and moons. It has been thought that in such hypervelocity impacts, the impactor is instantly subjected to a strong shock wave, heating, melting, and vaporizing, leading to the ejection of high-temperature vapor and molten particles. However, how this impact phenomenon "actually proceeds, what pressures and temperatures the impactor experiences," and especially how differences in the porosity of the impactor and target influence the outcome,