Editing Crux (section)

===Scorpius–Centaurus association===

Unusually, a total of 15 of the 23 brightest stars in Crux are spectrally blue-white B-type stars.<ref name=bagnall/> Among the five main bright stars, Delta, and probably Alpha and Beta, are likely co-moving B-type members of the [[Scorpius–Centaurus association]], the nearest [[stellar association|OB association]] to the [[Sun]].<ref name=Preibisch>{{cite journal|title=The Nearest OB Association: Scorpius–Centaurus (Sco OB2)|author1=Preibisch, T. |author2=Mamajek, E. |year=2008|journal=Handbook of Star-Forming Regions|volume=2|page=235|bibcode=2008hsf2.book..235P|arxiv=0809.0407}}</ref><ref name=mnras416_3108>{{citation | last1=Rizzuto | first1=Aaron | last2=Ireland| first2=Michael | last3=Robertson | first3=J. G. | title=Multidimensional Bayesian membership analysis of the Sco OB2 moving group | journal=Monthly Notices of the Royal Astronomical Society |date=October 2011 | volume=416 | issue=4 | pages=3108–3117 | doi=10.1111/j.1365-2966.2011.19256.x | doi-access=free | bibcode=2011MNRAS.416.3108R | arxiv=1106.2857 | s2cid=54510608 | postscript=. }}</ref> They are among the highest-mass stellar members of the Lower Centaurus–Crux subgroup of the association, with ages of roughly 10 to 20&nbsp;million years.<ref>{{cite journal | bibcode=1989A&A...216...44D |author1=de Geus, E. J. |author2=de Zeeuw, P. T. |author3= Lub, J. |name-list-style=amp | title= Physical Parameters of Stars in the Scorpio-Centaurus OB Association| journal=[[Astronomy & Astrophysics]]| volume=216 | issue=3 | year=1989 | pages=44–61 }}</ref><ref>{{cite journal |bibcode=2002AJ....124.1670M |doi=10.1086/341952 |author1=Mamajek, E. E. |author2=Meyer, M. R. |author3=Liebert, James |title=Post-T Tauri Stars in the Nearest OB Association |journal=[[Astronomical Journal]] |volume=124 |issue=3 |year=2002 |pages=1670–1694 |arxiv=astro-ph/0205417 |s2cid=16855894 }}</ref> Other members include the blue-white stars [[Zeta Crucis|Zeta]], [[Lambda Crucis|Lambda]] and both the components of the visual [[double star]], [[Mu Crucis|Mu]].<ref name=dezeeuw99>{{cite journal|title=A Hipparcos Census of Nearby OB Associations|author1=de Zeeuw, P.T. |author2=Hoogerwerf, R. |author3=de Bruijne, J.H.J. |author4=Brown, A.G.A. |author5=Blaauw, A. |year=1999|journal=Astronomical Journal|volume=117|issue=1|pages=354–99|bibcode=1999AJ....117..354D|doi=10.1086/300682|arxiv = astro-ph/9809227 |s2cid=16098861 }}</ref>