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Beta Lyrae (β Lyr, β Lyrae) is a binary star system approximately away in the constellation Lyra. ==Etymology== Beta Lyrae has the traditional name Sheliak (occasionally ''Shelyak'' or ''Shiliak''),〔 derived from الشلياق ''šiliyāq'' or ''Al Shilyāk,'' the Arabic name of the constellation of Lyra. The meaning of the name ''Sheliak'' is debated. It has been suggested to derive from السلحفاة ''al-sulḥafāt'', the Arabic word for "tortoise." This, however, is likely an error related to a fellow star in Lyra: Sulafat.〔http://stars.astro.illinois.edu/sow/sulafat.html〕〔http://www.constellationsofwords.com/stars/Sheliak.html (Names, Their Lore and Meaning, Richard Hinckley Allen, 1889 ).〕 ''Sheliak'' has also been linked to the meaning "eagle." Again, this is likely due to another star in the same constellation, Vega. Its name has been linked to the Arabic word ''wāqi‘'', meaning "falling" or "landing", via the phrase ''an-nasr al-wāqi‘'', "the falling eagle".〔https://books.google.com/books?id=szgnwKRanHEC&pg=PA55&lpg=PA55&dq=sheliak+meaning+arabic+star&source=bl&ots=sa57hfTAG-&sig=_DhwI7YPnSff3p5NsSSRoK8_q0o&hl=en&sa=X&ved=0CEkQ6AEwCGoVChMIo5288pSaxwIVFjaICh03_AAo#v=onepage&q=sheliak%20meaning%20arabic%20star&f=false〕 It is possible the name ''Sheliak'' is of non-Arabic origin, as it has no other meaning in Arabic and cannot be identified with an Arabic triliteral root.〔Edward William Lane, ''Arabic-English Lexicon''〕 In China, the star was named ''Tsan Tae''.,〔 from (), meaning ''Clepsydra Terrace'', refers to an asterism consisting of this star, δ2 Lyrae, γ Lyrae and ι Lyrae.〔 (AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 7 月 3 日 )〕 Consequently, β Lyrae itself is known as (, (英語:the Second Star of Clepsydra Terrace).) The Bayer designation for this star was given by the German astronomer Johann Bayer with the publication of his star atlas ''Uranometria'' in 1603. It was given the Flamsteed designation 10 Lyrae by John Flamsteed in 1712 with the first publication of his star catalogue. The variable luminosity of this system was discovered in 1784 by the British amateur astronomer John Goodricke.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Beta Lyrae」の詳細全文を読む スポンサード リンク
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