alpha cvn造句

Alpha CVn is the brightest point of light in the northern constellation of Canes Venatici.
Alpha CVn is a binary star with a combined apparent magnitude of 2.81.
Gamma Equulei is an alpha CVn star, ranging between magnitudes 4.58 and 4.77 over a period of around 12?minutes.
In the western world Alpha CVn had no name until the 17th century, when it was named " Cor Caroli ", which means " Charles's Heart ".
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