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physical object > natural object > celestial body > star > early star > Wolf-Rayet

Wolf-Rayet comparison table

Subject	is part of	has orbital period	is an instance of	has optical brightness variation	has light curve	has observational problem	has abundance	has period	has amplitude	has eclipse duration	is a kind of	has name designated with	has observable variation time scale	has emission line	has definition	has number of star
[WR] star											Wolf-Rayet			He I, He II	WR star that is the central object of a planetary nebula.
CV Serpentis	Serpens	29.6 days	eclipsing binary	0.2 magnitudes or greater		some difficulty in distinguishing between various kinds	half the stars in the solar neighborhood are members of star systems					R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted V 335, V 336, etc., when the double letter designations are exhausted	within a period of decades	He I, He II	A sometimes-eclipsing binary composed of a Wolf-Rayet star and a B0 star.	2
WC star											Wolf-Rayet			He I, He II, C II, C III or C IV
WN star											Wolf-Rayet			He I, He II, N III, N IV or N V
WO star											Wolf-Rayet			He I, He II, O IV, O V or O VI

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