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2009年02月02日Final moments of planetary remnants seen for first timeFebruary 2, 2009, Brighton, East Sussex, United Kingdom: An impression of the high-mass X-ray binary called Cygnus X-1. It consists of a blue supergiant star (right) called HDE 226868, orbiting what is in all likelihood a black hole. The black hole is sucking gas from the blue star‘s atmosphere, leading to the formation of an accretion disc around the black hole...The moment that debris from destroyed planets impacts the surface of a white dwarf star has been observed for the first time by astronomers at the University of Warwick..They have used X-rays to detect the rocky and gaseous material left behind by a planetary system after its host star dies as it collides and is consumed within the surface of the star..Published on 9 February in the journal Nature, the results are the first direct measurement of the accretion of rocky material onto a white dwarf, and confirm decades of indirect evidence of accretion in over a thousand stars so far. The observed event occurred billions of years after the formation...
商品コード: 2022021200845
2020年05月25日Hong Kong News - May 25, 2020May 25, 2020, Hong Kong, China: Xie Feng, Commissioner of the Office of the Commissioner of the Ministry of Foreign Affairs of the People‘s Republic of China in Hong Kong, meets the press on the proposed national security law, Admiralty, Hong Kong. 25MAY20 (Credit Image: © K. Y. Cheng/South China Morning Post via ZUMA Wire)、クレジット：©Ｋ． Ｙ． Ｃｈｅｎｇ／Ｓｏｕｔｈ Ｃｈｉｎａ Ｍｏｒｎｉｎｇ Ｐｏｓｔ ｖｉａ ＺＵＭＡ Ｗｉｒｅ／共同通信イメージズ
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