Editing Planetary system (section)

====High-mass stars====
Planets orbiting [[pulsar]]s have been discovered. Pulsars are the remnants of the [[supernova]] explosions of high-mass stars, but a planetary system that existed before the supernova would likely be mostly destroyed. Planets would either evaporate, be pushed off of their orbits by the masses of gas from the exploding star, or the sudden loss of most of the mass of the central star would see them escape the gravitational hold of the star, or in some cases the supernova would [[pulsar kick|kick]] the pulsar itself out of the system at high velocity so any planets that had survived the explosion would be left behind as free-floating objects. Planets found around pulsars may have formed as a result of pre-existing stellar companions that were almost entirely evaporated by the supernova blast, leaving behind planet-sized bodies. Alternatively, planets may form in an [[accretion disk]] of fallback matter surrounding a pulsar.<ref>{{cite journal|bibcode=1993ASPC...36..149P|title=Planet formation scenarios|last1=Podsiadlowski|first1=Philipp|volume=36|date=1993|pages=149|journal=In: Planets Around Pulsars; Proceedings of the Conference}}</ref> Fallback disks of matter that failed to escape orbit during a supernova may also form planets around [[black hole]]s.<ref name="fallback">{{cite journal |last1=Perna |first1=Rosalba |title=The Fate of Fallback Matter Around Newly Born Compact Objects |date=2013-12-17 |last2=Duffell |first2=Paul |last3=Cantiello |first3=Matteo |last4=MacFadyen |first4=Andrew |journal=The Astrophysical Journal |volume=781 |issue=2 |page=119 |doi=10.1088/0004-637X/781/2/119 |arxiv=1312.4981 |author-link1=Rosalba Perna}}</ref>