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银河系中心的龙卷风
#太空

在银河系中心区域的狂暴环境中,环绕着我们银河核心超大质量黑洞的尘埃与气体不断翻搅,强烈的震波在其中扩散。国际团队利用阿塔卡马大型毫米次毫米波阵列(ALMA),将我们对这一剧烈活动的观测解析度提升了100倍,并在这片神秘的宇宙区域发现了一种全新的丝状结构。这些细长丝状结构与任何恒星形成区域都没有空间上的对应关系。它们是在一氧化矽(SiO)及其他八种分子的发射谱线中偶然发现的,且视线速度具有一致性,与气体外流的特征并不相符。因此,它们与过去发现的高密度气体丝状结构有所不同。此外,这些丝状结构与尘埃辐射并无关联,也未处于流体静力平衡状态。这些细长丝状结构在物质循环过程中扮演的重要角色,它们就像是宇宙龙卷风——剧烈流动,迅速消散,并有效地将物质输送到周围环境中。目前仍不清楚这些细长丝状结构的起源,但研究团队推测,震波作用是最可能的形成机制。
天文館:銀河系中心的「宇宙龍捲風」 NRAO:Astronomers Discover “Space Tornadoes” Around the Milky Way’s Core



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银河系中心的龙卷风
#太空

在银河系中心区域的狂暴环境中,环绕着我们银河核心超大质量黑洞的尘埃与气体不断翻搅,强烈的震波在其中扩散。国际团队利用阿塔卡马大型毫米次毫米波阵列(ALMA),将我们对这一剧烈活动的观测解析度提升了100倍,并在这片神秘的宇宙区域发现了一种全新的丝状结构。这些细长丝状结构与任何恒星形成区域都没有空间上的对应关系。它们是在一氧化矽(SiO)及其他八种分子的发射谱线中偶然发现的,且视线速度具有一致性,与气体外流的特征并不相符。因此,它们与过去发现的高密度气体丝状结构有所不同。此外,这些丝状结构与尘埃辐射并无关联,也未处于流体静力平衡状态。这些细长丝状结构在物质循环过程中扮演的重要角色,它们就像是宇宙龙卷风——剧烈流动,迅速消散,并有效地将物质输送到周围环境中。目前仍不清楚这些细长丝状结构的起源,但研究团队推测,震波作用是最可能的形成机制。
天文館:銀河系中心的「宇宙龍捲風」 NRAO:Astronomers Discover “Space Tornadoes” Around the Milky Way’s Core

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Telegram today rolling out an update which brings with it several new features.The update also adds interactive emoji. When you send one of the select animated emoji in chat, you can now tap on it to initiate a full screen animation. The update also adds interactive emoji. When you send one of the select animated emoji in chat, you can now tap on it to initiate a full screen animation. This is then visible to you or anyone else who's also present in chat at the moment. The animations are also accompanied by vibrations. This is then visible to you or anyone else who's also present in chat at the moment. The animations are also accompanied by vibrations.

What is Telegram?

Telegram’s stand out feature is its encryption scheme that keeps messages and media secure in transit. The scheme is known as MTProto and is based on 256-bit AES encryption, RSA encryption, and Diffie-Hellman key exchange. The result of this complicated and technical-sounding jargon? A messaging service that claims to keep your data safe.Why do we say claims? When dealing with security, you always want to leave room for scrutiny, and a few cryptography experts have criticized the system. Overall, any level of encryption is better than none, but a level of discretion should always be observed with any online connected system, even Telegram.

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