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已知最遥远星系中发现氧元素
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两个不同天文学家团队借助阿塔卡马大型毫米波/亚毫米波阵列(ALMA),在已知最遥远的星系 JADES-GS-z14-0 中发现了氧元素。这一发现将促使天文学家重新思考早期宇宙中星系形成的速度。JADES-GS-z14-0 于2024年由韦伯太空望远镜发现,是迄今为止确认的最遥远星系,距地约 134 亿光年,这意味着人们看到的是其宇宙年龄仅为 3 亿年(大爆炸后3亿年)时的样子。新发现的氧气表明,该星系的化学成熟度远超预期。星系通常在生命伊始就充满了年轻的恒星,这些恒星主要由氢和氦等轻元素构成。随着恒星的演化,它们会产生氧等重元素,这些元素在恒星死亡后被散布到其所在的星系中。研究人员曾认为,在宇宙 3 亿岁时,它仍然太年轻,不可能有富含重元素的星系。然而这两项新研究表明,JADES-GS-z14-0的重元素含量比预期高出约10倍。
科技日报:最遥远星系中发现氧元素



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已知最遥远星系中发现氧元素
#太空

两个不同天文学家团队借助阿塔卡马大型毫米波/亚毫米波阵列(ALMA),在已知最遥远的星系 JADES-GS-z14-0 中发现了氧元素。这一发现将促使天文学家重新思考早期宇宙中星系形成的速度。JADES-GS-z14-0 于2024年由韦伯太空望远镜发现,是迄今为止确认的最遥远星系,距地约 134 亿光年,这意味着人们看到的是其宇宙年龄仅为 3 亿年(大爆炸后3亿年)时的样子。新发现的氧气表明,该星系的化学成熟度远超预期。星系通常在生命伊始就充满了年轻的恒星,这些恒星主要由氢和氦等轻元素构成。随着恒星的演化,它们会产生氧等重元素,这些元素在恒星死亡后被散布到其所在的星系中。研究人员曾认为,在宇宙 3 亿岁时,它仍然太年轻,不可能有富含重元素的星系。然而这两项新研究表明,JADES-GS-z14-0的重元素含量比预期高出约10倍。
科技日报:最遥远星系中发现氧元素

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Telegram has exploded as a hub for cybercriminals looking to buy, sell and share stolen data and hacking tools, new research shows, as the messaging app emerges as an alternative to the dark web.An investigation by cyber intelligence group Cyberint, together with the Financial Times, found a ballooning network of hackers sharing data leaks on the popular messaging platform, sometimes in channels with tens of thousands of subscribers, lured by its ease of use and light-touch moderation.

Export WhatsApp stickers to Telegram on Android

From the Files app, scroll down to Internal storage, and tap on WhatsApp. Once you’re there, go to Media and then WhatsApp Stickers. Don’t be surprised if you find a large number of files in that folder—it holds your personal collection of stickers and every one you’ve ever received. Even the bad ones.Tap the three dots in the top right corner of your screen to Select all. If you want to trim the fat and grab only the best of the best, this is the perfect time to do so: choose the ones you want to export by long-pressing one file to activate selection mode, and then tapping on the rest. Once you’re done, hit the Share button (that “less than”-like symbol at the top of your screen). If you have a big collection—more than 500 stickers, for example—it’s possible that nothing will happen when you tap the Share button. Be patient—your phone’s just struggling with a heavy load.On the menu that pops from the bottom of the screen, choose Telegram, and then select the chat named Saved messages. This is a chat only you can see, and it will serve as your sticker bank. Unlike WhatsApp, Telegram doesn’t store your favorite stickers in a quick-access reservoir right beside the typing field, but you’ll be able to snatch them out of your Saved messages chat and forward them to any of your Telegram contacts. This also means you won’t have a quick way to save incoming stickers like you did on WhatsApp, so you’ll have to forward them from one chat to the other.

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