Its abbreviation is Vul. It is a small constellation located south of Cygnus, in the middle of the Milky Way in the early autumn sky. It was founded by J. Hevelius in the 17th century. It has no bright stars. The faint object M27 is 720 light years away and is a planetary nebula called the Dumbbell Nebula, which shines as a circular ring of gas spreading out in all directions from the central star. Its approximate position is 20h10m in right ascension and +25° in declination. It reaches its culmination at 8pm in late September. [Ishida Goro] Source: Heibonsha World Encyclopedia, 2nd Edition Information |
略号はVul。はくちょう座の南,初秋の空の天の川のただ中にある小星座。17世紀にJ.ヘベリウスが創設した。輝星はない。微光天体M27は距離720光年にあり,亜鈴星雲と呼ばれる惑星状星雲で,中心星から四方へ散出するガスが丸く取り巻いて輝いている。概略位置は赤経20h10m,赤緯+25゜。午後8時の南中は9月下旬である。【石田 五郎】
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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