比心

天文学家发现一个围绕红矮星运行的“棉花糖”世界_我的网站

A |     Short videos posted by a Nigerian sales representative in eastern China's Zhejiang Province are helping a Chinese farm machinery producer reach overseas customers, with one TikTok post attracting more than 1.2 million views.     Onyekwelu Patrick Chinazam, known by his Chinese name Zheng Zewei, works for Zhejiang Jiying Intelligent Agricultural Machinery Equipment in Changshan county. He is responsible for expanding the company's overseas business and introducing its products to international customers in fluent Chinese.        Zheng focuses mainly on Southeast Asian markets, including Malaysia and Laos. He sells up to 16 machines a month to Malaysia.    He also runs a TikTok account featuring demonstrations of the company's products, including a tracked transporter designed for mountainous terrain. The account has attracted more than 20,000 followers and become an important channel for overseas customers to learn about Chinese farm machinery.    Zheng's connection with China began at a Confucius Institute in Nigeria. Although he studied real estate, he took up Chinese to improve his career prospects. He came to China in 2019 to pursue a master's degree in international Chinese language education in Qufu, Shandong province, and joined the farm machinery company in late 2020. He moved with the company to Changshan in 2023.    Zheng said China's well-developed shipping logistics and efficient cross-border trade services have helped smart farm machinery reach more overseas markets. He said he hopes to bring China's agricultural mechanization experience back to Nigeria.                    。    在他们的观测中，天文学家注意到，这个“棉花糖”世界，正如许多人所认为的那样，似乎比我们之前探测到的任何其他气态巨行星的密度都要低得多。此外，它与它所环绕的红矮星的距离很近，这引起了关于该行星形成的更多问题。卡内基科学研究所地球和行星实验室的研究员Shubham Kanodia在NOIRLab共享的新闻稿中说：“传统上认为红矮星周围的巨行星很难形成。天文学家已经开始称这是一个‘棉花糖’世界，原因是这个气态巨行星具有与棉花糖相似的密度。”但是，这个气气态巨行星究竟是如何变成如此低的密度的，这让科学家们感到困惑。

B | 然而，他们已经为这个“棉花糖”世界的密度提出了至少一个可能的原因。而这个理由可能与该行星的岩石核心有关。据信，气态巨行星开始时是巨大的岩石核心，质量是地球的10倍。从那里，它们迅速拉入大量邻近的气体，形成我们今天所知道的“巨无霸”。其他的气态巨行星，如木星，甚至可能因吞噬其他行星而长到如此大。这颗被称为TOI-3757 b的行星有可能在其核心内有较低的重元素丰度，因此岩质核心形成得更慢，推迟了气体吸积的开始。未来对这个“棉花糖”世界的观察（也许用詹姆斯-韦伯太空望远镜）可以告诉我们更多关于它的大气和密度的信息。研究人员在《天文学杂志》上发表了一篇关于该行星的论文。

C |

Current article:http://0gvzk46.liangkuataosanxuanmiancen.sbs/vhdul/6uq31r.html

Published on:03:45:22