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天文学家发现了带有四个“太阳”的奇怪星系。_我的网站

一 |     The senator told the Greek news agency that the United States would sell military equipment to those who share its values, "not just for financial gain," and listed a number of problems on which Ankara should change its behavior and attitude. Among them are the issue of acquiring the Russia's S-400 system, flights over the Greek islands, Turkey's close relations with Russia, and human rights violations, including the imprisonment of journalists and lawyers.,Menendez added that the list of outstanding issues is long, and they must be resolved in order to achieve the sale and modernization of the F-16 jets, but he had not yet seen the readiness of Turkish President Recep Tayyip Erdogan to take any of these steps, the news agency reported.,Menendez is considered a person who "holds the keys to the F-16," since he has the power to veto the sale of the US weapons systems as the chairman of the Committee on Foreign Relations, the agency said.,Ankara Hopes for Success in F-16 Deal With US, Turkish Defence Minister Says10 May, 14:41 GMT,Turkey plans to purchase 40 F-16 fighter jets from the US, and modernize another 80 which it already has in service. US President Joe Biden said that he expects to obtain a congressional approval for the sale of the jets to Turkey, but a group of the US congressmen signed a statement objecting to the sale.。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。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。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。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。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。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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