Editing Stellar classification (section)

===Class G===
{{Redirect|G star||G star (disambiguation)}}
{{See also|G-type main-sequence star|Yellow supergiant|Yellow hypergiant}}
[[File:G5V star spectrum.png|thumb|Spectrum of a hypothetical G5V star]]
G-type stars, including the [[Sun]],<ref name="SunSpectrum"/> have prominent spectral lines ''H'' and ''K'' of [[calcium|Ca]]&nbsp;II, which are most pronounced at G2. They have even weaker hydrogen lines than F, but along with the ionized metals, they have neutral metals. There is a prominent spike in the G band of [[cyanide|CN]] molecules. Class&nbsp;G main-sequence stars make up about 7.5%, nearly one in thirteen, of the main-sequence stars in the solar neighborhood.  There are 21 G-type stars within 10pc.<ref group=lower-alpha name="proportions"/><ref name="LeDrew2001"/>

Class G contains the "Yellow Evolutionary Void".<ref>{{Cite journal |title=Checking the yellow evolutionary void. Three evolutionary critical Hypergiants: HD 33579, HR 8752 & IRC +10420 |journal=Astronomy and Astrophysics |volume=353 |pages=163 |bibcode=2000A&A...353..163N |last1=Nieuwenhuijzen |first1=H. |last2=De Jager |first2=C. |year=2000}}</ref> Supergiant stars often swing between O or B (blue) and K or M (red). While they do this, they do not stay for long in the unstable [[yellow supergiant]] class.

'''Example spectral standards:'''<ref name="Garrison"/>
* G0V – [[Beta Canum Venaticorum]]
* G0IV – [[Eta Boötis]]
* G0Ib – [[Beta Aquarii]]
* G2V – [[Sun]]
* G5V – [[Kappa1 Ceti]]
* G5IV – [[Mu Herculis]]
* G5Ib – [[9 Pegasi]]
* G8V – [[61 Ursae Majoris]]
* G8IV – [[Beta Aquilae]]
* G8IIIa – [[Kappa Geminorum]]
* G8IIIab – [[Epsilon Virginis]]
* G8Ib – [[Epsilon Geminorum]]