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Kronberger 61 : ウィキペディア英語版 | Kronberger 61
Kronberger 61 also known as the "soccer ball" is a Nebula discovered by an amateur astronomer in January, 2011, with the newer images having been taken by the Gemini Observatory. The nebula is named for Austrian Mattias Kronberger, who is a member of the amateur group Deep Sky Hunters. The object is estimated to lie 13,000 light-years away. They discovered the nebula while searching near the northern constellation of Cygnus. It is hoped that the discovery will help resolve a decades-old debate: are stellar companions key to the formation and structure of planetary nebulae? The nebula is within a relatively small area which is currently being monitored by NASA’s Kepler planet finding mission and the light of the nebula is primarily due to the emissions from doubly ionized oxygen.〔 ==References==
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