The formation of impact craters is a highly dynamic and complex process that subjects the
impacted target rocks to numerous types of deformation mechanisms. Understanding and …

Samples of the carbonaceous asteroid Ryugu were brought to Earth by the Hayabusa2
spacecraft. We analyzed 17 Ryugu samples measuring 1 to 8 millimeters. Carbon dioxide …

This chapter is dedicated to H. Jay Melosh who tragically passed away during this endeavor.
From his earliest publications on the concept of acoustic fluidization, to the publication of his …

Abstract The Asteroid Impact & Deflection Assessment (AIDA) mission is an international
cooperation between NASA and ESA. NASA plans to provide the Double Asteroid …

Nearly thirty years since its inception, the combined finite-discrete element method (FDEM)
has made remarkable strides in becoming a mainstream analysis tool within the field of …

Almost every meteorite impact occurs at an oblique angle of incidence, yet the effect of
impact angle on crater size or formation mechanism is only poorly understood. This is, in …

The South Pole-Aitken (SPA) basin is the largest and oldest definitive impact structure on the
Moon. To understand how this immense basin formed, we conducted a suite of SPA-scale …

Earth is continually impacted by very small asteroids and debris, and a larger object, though
uncommon, could produce a severe natural hazard. During impact crater formation the …

Impact‐induced fracturing creates porosity that is responsible for many aspects of the
geophysical signature of an impact crater. This paper describes a simple model of dilatancy …

The DART spacecraft will impact Didymos's secondary, Dimorphos, at the end of 2022 and
cause a change in the orbital period of the secondary. For simplicity, most previous …