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2024 年 4 月 24 日

龙蛋的双极瓣辐射云
影像提供与版权: Rowan Prangley

说明: 为何单颗恒星能形成这团美丽的星云呢?发射星云NGC6164的中心有颗质量异常庞大的恒星。这颗被喻为牡蛎珍珠的中心恒星,据传是受到神话中的天坛战龙 保护的龙蛋。位于此主题影像中心、编录号为HD148937的这颗恒星,是如此的炽热,因此会辐射紫外光加热周围的气体。这些气体很可能是这颗恒星先前抛出的,具体成因则可能是与另一颗绕行的伴星之间的重力作用所致。而所抛出的物质,可能受到这颗大质量恒星的磁场之引导,最后聚成形状对称的双极瓣星云。跨幅约4光年的NGC6164,座落在南天矩尺座方向约3,600光年远之处。



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2024 年 4 月 24 日

龙蛋的双极瓣辐射云
影像提供与版权: Rowan Prangley

说明: 为何单颗恒星能形成这团美丽的星云呢?发射星云NGC6164的中心有颗质量异常庞大的恒星。这颗被喻为牡蛎珍珠的中心恒星,据传是受到神话中的天坛战龙 保护的龙蛋。位于此主题影像中心、编录号为HD148937的这颗恒星,是如此的炽热,因此会辐射紫外光加热周围的气体。这些气体很可能是这颗恒星先前抛出的,具体成因则可能是与另一颗绕行的伴星之间的重力作用所致。而所抛出的物质,可能受到这颗大质量恒星的磁场之引导,最后聚成形状对称的双极瓣星云。跨幅约4光年的NGC6164,座落在南天矩尺座方向约3,600光年远之处。

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Telegram Gives Up On Crypto Blockchain Project

Durov said on his Telegram channel today that the two and a half year blockchain and crypto project has been put to sleep. Ironically, after leaving Russia because the government wanted his encryption keys to his social media firm, Durov’s cryptocurrency idea lost steam because of a U.S. court. “The technology we created allowed for an open, free, decentralized exchange of value and ideas. TON had the potential to revolutionize how people store and transfer funds and information,” he wrote on his channel. “Unfortunately, a U.S. court stopped TON from happening.”

Should I buy bitcoin?

“To the extent it is used I fear it’s often for illicit finance. It’s an extremely inefficient way of conducting transactions, and the amount of energy that’s consumed in processing those transactions is staggering,” the former Fed chairwoman said. Yellen’s comments have been cited as a reason for bitcoin’s recent losses. However, Yellen’s assessment of bitcoin as a inefficient medium of exchange is an important point and one that has already been raised in the past by bitcoin bulls. Using a volatile asset in exchange for goods and services makes little sense if the asset can tumble 10% in a day, or surge 80% over the course of a two months as bitcoin has done in 2021, critics argue. To put a finer point on it, over the past 12 months bitcoin has registered 8 corrections, defined as a decline from a recent peak of at least 10% but not more than 20%, and two bear markets, which are defined as falls of 20% or more, according to Dow Jones Market Data.

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