Impacts From Interstellar Objects Should Leave Very Distinct Craters - by ET_Exists
in 2017 and 2019, respectively. In their paper, the Yale researchers discussed how the volume of impact melt within fixed-diameter craters could be a possible pathway for recognizing ISO craters, as higher velocity impacts produce greater volumes of impact melt.
“`Oumuamua and Borisov were landmark discoveries,” said Samuel Cabot, a PhD Candidate in the Department of Astronomy at Yale University. “They have generated a considerable response in the astrophysics community. At present, there is no theory that adequately explains every aspect of `Oumuamua. The strongest arguments to date point to a completely new type of astronomical object, beyond the asteroids and comets we are familiar with.
Copernicus Crater on the Moon imaged by the Lunar Reconnaissance Orbiter. Impact melt is located within the smoother upper left quadrant of this 93 km wide, 3.8 km deep impact crater. For their study, the researchers conducted hydrodynamical simulations with projectiles of varying mass and impact velocities up to 100 km per second. The researchers chose a maximum velocity of 100 km per second since it is currently hypothesized that impacts within our solar system never reach equal to or greater than this velocity, thus these speeds are rarely used in scientific literature.
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