|quote=<span style="font-family:LatinModern;"><small>... confirm the peculiar behaviour of Li in the effective temperature range 5600–5900 K ... We found that the immense majority of planet host stars have severely depleted lithium ... At higher and lower temperatures planet-host stars do not appear to show any peculiar behaviour in their Li abundance.</small></span>}}</ref> The Sun's hassurface layers have less than 1% the lithium itof once had inthe itsoriginal formation protosolar gas clouds despite the surface convective zone not being hot enough to burn lithium.<ref name = "Israelian"/> It is suspected that the gravitational pull of planets might churnenhance the churning up aof the star's surface, driving the lithium to hotter cores where [[lithium burning]] occurs.<ref name="Discover"/><ref name = "Israelian"/> The absence of lithium could also be a way to find new planetary systems.<ref name="Discover"/> However, this claimed relationship has become a point of contention in the planetary astrophysics community, being frequently denied<ref name="BaumannRamírez2010">{{cite journal|last1=Baumann|first1=P.|last2=Ramírez|first2=I.|last3=Meléndez|first3=J.|last4=Asplund|first4=M.|last5=Lind|first5=K.|display-authors=2|title=Lithium depletion in solar-like stars: no planet connection|journal=Astronomy and Astrophysics|volume=519|year=2010|pages=A87|issn=0004-6361|doi=10.1051/0004-6361/201015137|doi-access=free}}</ref><ref name="RamírezFish2012">{{cite journal|last1=Ramírez|first1=I.|last2=Fish|first2=J. R.|last3=Lambert|first3=D. L.|last4=Allende Prieto|first4=C.|display-authors=2|title=Lithium abundances in nearby FGK dwarf and subgiant stars: internal destruction, galactic chemical evolution, and exoplanets|journal=The Astrophysical Journal|volume=756|issue=1|year=2012|pages=46|issn=0004-637X|doi=10.1088/0004-637X/756/1/46|hdl=2152/34872|hdl-access=free}}</ref> but also supported<ref name="FigueiraFaria2014">{{cite journal|last1=Figueira|first1=P.|last2=Faria|first2=J. P.|last3=Delgado-Mena|first3=E.|last4=Adibekyan|first4=V. Zh.|last5=Sousa|first5=S. G.|last6=Santos|first6=N. C.|last7=Israelian|first7=G.|display-authors=2|title=Exoplanet hosts reveal lithium depletion|journal=Astronomy & Astrophysics|volume=570|year=2014|pages=A21|issn=0004-6361|doi=10.1051/0004-6361/201424218|doi-access=free}}</ref><ref name="Delgado MenaIsraelian2014">{{cite journal|last1=Delgado Mena|first1=E.|last2=Israelian|first2=G.|last3=González Hernández|first3=J. I.|last4=Sousa|first4=S. G.|last5=Mortier|first5=A.|last6=Santos|first6=N. C.|last7=Adibekyan|first7=V. Zh.|last8=Fernandes|first8=J.|last9=Rebolo|first9=R.|last10=Udry|first10=S.|last11=Mayor|first11=M.|display-authors=2|title=Li depletion in solar analogues with exoplanets|journal=Astronomy & Astrophysics|volume=562|year=2014|pages=A92|issn=0004-6361|doi=10.1051/0004-6361/201321493|doi-access=free}}</ref>.
===Higher than expected lithium in metal-poor stars===
