An Etymological Dictionary of Astronomy and Astrophysics

English-French-Persian

فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

Homepage  Preliminaries  Abbreviations  Acknowledgments  References 
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Rasalhague (α Ophiuchi)
  رأس‌الحیه  
ra's-el-hayyé (#)
Fr.: Rasalhague  

The brightest star (V = 2.08) in the constellation → Ophiuchus. Rasalhague is a
→ giant star of type A5 lying 47 light-years from Earth. It has a faint, very close companion only 0’’.5 away, 7 A.U., that orbits with a period of 8.7 years.

See also: Rasalhague, from Ar. Ra’s al-Hayyah (رأس‌الحیه), literally the “head of the snake,” from ra’s “head” + Hayyah “snake,” referring to the creature in Gk. mythology.