Editing Granular convection (section)

===Astronomy===
In [[astronomy]], it is common in low density, or [[rubble pile]] [[asteroid]]s, for example the asteroid [[25143 Itokawa]]<ref>{{Cite APOD |date=22 April 2007 |title=Smooth Sections of Asteroid Itokawa |access-date=}}</ref> and [[101955 Bennu]].<ref>{{cite journal|arxiv=2002.01468|doi=10.1016/j.icarus.2020.113963 |pmc=7571586|title=Ricochets on asteroids: Experimental study of low velocity grazing impacts into granular media|year=2020|last1=Wright|first1=Esteban|last2=Quillen|first2=Alice C.|last3=South|first3=Juliana|last4=Nelson|first4=Randal C.|last5=Sánchez|first5=Paul|last6=Siu|first6=John|last7=Askari|first7=Hesam|last8=Nakajima|first8=Miki|last9=Schwartz|first9=Stephen R.|s2cid=219965690|journal=Icarus|volume=351|page=113963|pmid=33087944 |bibcode=2020Icar..35113963W}}</ref>