Dossier
polar craters
Coverage of polar craters in the Nexus archive.
- Where did Mercury get its water ice? Maybe from a slow asteroid impact in a single Mercurian day
New simulations suggest Mercury's water ice may have been delivered by a massive asteroid impact, similar to the one forming the Hokusai crater, which transported water across the planet in a single Mercurian day (176 Earth days) and trapped it in polar craters.