开学第一课

天文学家发现了带有四个“太阳”的奇怪星系。_我的网站

一 | 北京时间1月16日消息，我们的太阳系有一颗恒星和八颗行星。    Salman Khan and Hollywood icon Johnny Depp captivated audiences at the Red Sea International Film Festival, as viral photographs of their warm encounters and polite interactions quickly spread across social media, generating excitement among fans worldwide. The presence of these two veteran actors together sparked a wave of admiration and discussion, with many celebrating their meeting as a big cross-cultural event.           At the festival's closing ceremony, both stars presented themselves in their finest attire. Salman Khan chose a subtle and elegant style, wearing an ink-blue suit with a coordinating shirt, which beautifully enhanced his unique charm. Johnny Depp, known for his diverse yet classic fashion sense, donned a grey suit with a dark shirt and a scarf draped around his neck. The two were seen engaging in genuine conversations, sharing smiles, and posing for photographs, much to the delight of those in attendance.                                                                 View this post on Instagram          A post shared by Red Sea Film Foundation (@redseafilm)               Fans soon took to social media, expressing their surprise and pleasure at seeing two global icons in the same photo. A fan said, “When Bollywood meets Hollywood at the Red Sea Film Festival: Salman Khan and Johnny Depp serving looks and legends.” Another said, “Just look at the aura, man.” A third amused fan remarked, “Johnny Depp and Salman Khan, what kind of multiverse is this?!”            Salman also ran into Hollywood actors Idris Elba and Edgar Ramirez at the festival, and pictures of their meeting quickly went viral. At the event, Salman Khan presented the Red Sea Honoree Award to actor-director Idris Elba.           The description on the festival’s official social media account said, “Congratulations to actor and filmmaker Idris Elba for being honoured at RedSeaIFF25 with the Red Sea Honoree Award, presented by Salman Khan.”            Salman's most recent appearance was in Sikandar, which did not achieve the expected success. He also made a brief cameo in Aryan Khan's directorial debut web series, The Ba***ds of Bollywood.            On the work front, Salman Khan is currently preparing for his upcoming war drama, Battle of Galwan, directed by Apoorva Lakhia. This film draws inspiration from a chapter in the book India's Most Fearless 3, delving into the Indo-Chinese conflict in the Galwan Valley. A character poster featuring Salman has already been released, and fans are eagerly awaiting the first official look at this much-anticipated film.     Also Read: Salman Khan Says He Hasn’t Gone Out for Dinner in 25 Years at The Red Sea Film Festival。但其他星系可能远不止这些，而且会有两三颗恒星围绕彼此运行。一组天文学家发现了一个由四颗恒星组成的星系，它隐藏在146光年之外。

二 | 这个星系被命名为HD98800。天文学家利用智利的阿塔卡马大毫米阵列射电望远镜发现了它。射电望远镜是发现这个星系的关键，因为这些恒星被原行星盘所包围。据报道，最初的行星盘是指在行星形成之前出现在早期星系中的尘埃和气体环。最终，尘埃和气体会坍缩成行星，但在此之前，圆盘将阻止大部分光从星系中逃逸。然而，无线电波可以穿透灰尘。基于这一原理，科学家们利用射电望远镜在尘埃中发现了四颗独立的恒星。这四颗恒星形成了两对双星，一对在银河系的中心，另一对在数十亿英里外的轨道上。

三 | 根据天文学家的说法，外对命名为aa和ab，而中心对命名为ba和bb。由四颗恒星组成的星系本身很奇怪，但真正让这个星系奇怪的是原行星盘。在大多数系统中，原始的行星盘与主星对齐。

四 | 例如，在我们自己的太阳系中，所有的行星和小行星都在与太阳大致相同的平面上运动。HD98800的情况并非如此，它是一个由尘埃和气体组成的原行星盘，与中央恒星平面成直角。恒星系是人类发现的第一个具有这种垂直圆盘的双星系统，这表明宇宙中有许多未知现象等待发现。

五 | 此外，最初的行星盘通常最终形成行星，这意味着以各种奇怪的角度围绕二元系运行的行星可能会出现。我们通常不从这些奇怪的角度寻找行星，因此这表明人类可以在未来探索这些行星。

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Published on:00:11:46