I’m shocked by the streamers in the ejecta. In ordinary granular splash experiments we see nothing like this. A few musings about this in a thread… /1
I’m shocked by the streamers in the ejecta. In ordinary granular splash experiments we see nothing like this. A few musings about this in a thread… /1 https://t.co/uQc9cxXOFI
2/ Physicists have done granular impact experiments where a steel ball (for example) is dropped into a sandbox. Here’s an example. You can see the impact ejecta is in the shape of a cone, fairly uniform all the way around. Source: perso.univ-rennes1.fr/jerome.crassou…
3/ Here’s another example from a paper in Nature. Click to see the full picture. These studied the rebound splash up the centerline, but you can see the initial splashes are cones, fairly uniform in density all the way around. (Royer et al., 2005, nature.com/articles/nphys…)
4/ Streamers like we see in the DART images (which I find shocking!) were first seen in the Hayabusa 2 impact. This image of that impact is annotated in red to show the arrangement of streamers. (Kadino, et al., 2020, iopscience.iop.org/article/10.384…)
@DrPhiltill These are juices of Dumorohos splashing about on impact. Rich in iron.