[Edit group][Changes]Binary Stars

A binary star is a stellar system consisting of two stars orbiting around their center of mass. For each star, the other is its companion star. Recent research suggests that a large percentage of stars are part of systems with at least two stars. Binary star systems are very important in astrophysics, because observing their mutual orbits allows their mass to be determined. The masses of many single stars can then be determined by extrapolations made from the observation of binaries. Thanks - Mcdonalds

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Antares	ε CMa	α Cru	ε Sgr	α And
Algol	γ Cen	δ Ori	η Oph	β Dra
β TrA	Mira	Albireo	γ Cep	η Ser
γ Ara	η Ori	δ Vir	η Cas	β Lyr
δ Boo	β Cnc	ε Tau	δ Gem	χ Dra
β Del	23 UMa	γ Vir	β Aql	η Ara
α Del	γ Leo	δ TrA	HD 117440	70 Oph
ε TrA	CS Cam	β Sct	α Cap	α Cnc
β Sgr	ε Ret	δ Tuc	ε Tel	HD 92397
HD 113703	101 Aqr	δ Tau	B Vel	25 CVn
η Cap	HD 73389	F Cen	β Tuc	ε Boo
γ Del	α Lib	HD 69863	α Com	η Ant
41 Cap	η CMi	HD 73390	χ Aql	15 Boo
107 Aqr	D Cen	20 LMi	χ Tau	57 Cnc
ι Aps	χ Sgr	41 Ara	ε Tri	47 Boo
α CVn	γ Vol	Gliese 777	19 CVn	HD 38529
55 Cnc	16 Cyg	61 Cyg	3 Cen	η Car
γ Cae	HD 75289	γ Cru	Groombridge 1830	83 Leo
ι Cnc	ο Cap	24 Cnc	Cyg X-1	HD 80606
HD 80607	Gliese 623	Gliese 229	JB 668-991

ET.SKY-MAP

[Edit group][Changes]Binary Stars

[Edit list of memebers][Changes]Objects

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