Possible explanation for wind-like trails on comet surface
DOI: 10.1063/PT.5.028716
BBC : When the European Space Agency’s Rosetta was approaching comet 67P/Churyumov-Gerasimenko, its pictures of the cometary surface revealed 17 objects that appeared to have trails extending northward away from them. Such trails are common on Earth, where they are formed by wind depositing dust behind boulders or other objects. However, because the comet lacks an atmosphere, there isn’t any wind. On Monday at the 46th Lunar and Planetary Science Conference, Stefano Mottola, the project leader of the Rosetta Lander Imaging System, announced that the team believes the trails were caused by splash saltation . The trails would have formed when objects impacted the surface and dislodged particles, which then fell back in the patterns seen.
