Scorpio X-1 (Scorpio X-1) - Scorpio X-1 (English spelling) Scorpius X-1

Japanese: さそり座X‐1(蠍座X‐1) - さそりざエックスワン（英語表記）Scorpius X‐1

The brightest X-ray star in the sky, located in the constellation Scorpio. Abbreviated as Sco X-1. In 1962, an observation rocket discovered an X-ray source that was four orders of magnitude stronger than expected. Initially, the resolution of the observations was poor, and the X-ray source appeared to extend over a range of several tens of degrees, including the center of the galaxy. Soon after, it was discovered that most of the X-ray source was coming from a direction about 25 degrees north of the center of the galaxy in galactic coordinates, and since it was located in the constellation Scorpio, it was named Scorpio X-1.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

さそり座にある全天でもっとも明るいX線星。略号Sco X‐1。1962年に観測ロケットによって予想を4桁も上回る強い天体X線が発見された。当初は観測の分解能が悪く，これが銀河中心を含む数十度の範囲に広がっているように見えたものである。その後まもなく，この天体X線のほとんどは銀河中心から銀河座標で北のほうに25゜ほどの方向からくることが明らかになり，それがさそり座にあることからさそり座X‐1と命名された。

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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