Editing Planetary core (section)

==== Remnant planetary cores ====
Missions to bodies in the [[asteroid belt]] will provide more insight to planetary core formation. It was previously understood that collisions in the solar system fully merged, but recent work on planetary bodies argues that remnants of collisions have their outer layers stripped, leaving behind a body that would eventually become a planetary core.<ref>{{Cite journal|last1=Williams|first1=Quentin|last2=Agnor|first2=Craig B.|last3=Asphaug|first3=Erik|date=January 2006|title=Hit-and-run planetary collisions|journal=Nature|volume=439|issue=7073|pages=155–160|doi=10.1038/nature04311|pmid=16407944|issn=1476-4687|bibcode=2006Natur.439..155A|s2cid=4406814}}</ref> The [[Psyche mission]], titled “Journey to a Metal World,” is aiming to studying [[16 Psyche|a body]] that could possibly be a remnant planetary core.<ref>{{Cite book|last1=Lord|first1=Peter|last2=Tilley|first2=Scott|last3=Oh|first3=David Y.|last4=Goebel|first4=Dan|last5=Polanskey|first5=Carol|last6=Snyder|first6=Steve|last7=Carr|first7=Greg|last8=Collins|first8=Steven M.|last9=Lantoine|first9=Gregory|title=2017 IEEE Aerospace Conference |chapter=Psyche: Journey to a metal world |date=March 2017|pages=1–11|publisher=IEEE|doi=10.1109/aero.2017.7943771|isbn=9781509016136|s2cid=45190228}}</ref>