Why Are Most Impact Craters Perfectly Circular? (Rather than Ovals) скачать в хорошем качестве

Why Are Most Impact Craters Perfectly Circular? (Rather than Ovals)

A question sometimes asked is why an asteroid hitting a surface at an angle still produces a circular crater. Intuition suggests that there should be a smooth transition towards increasingly elliptical craters as the impact angle gets lower and lower. However simulations and experiments show that craters remain circular over most of the range of possible impacts. Selected sources: Clemens Rumpf - graph of impact angle vs instances ~0:54 https://agupubs.onlinelibrary.wiley.c... Hypervelocity impact experiment into sand at the NASA Ames Vertical Gun Range    • Hypervelocity impact experiment into sand ...   Visualization and Analysis of Threats from Asteroid Ocean Impacts    • Visualization and Analysis of Threats from...   The transition from circular to elliptical impact craters https://agupubs.onlinelibrary.wiley.c...