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天文学家首度利用韦伯太空望远镜，针对蝘蜓座 I 分子云（Chamaeleon I molecular cloud）绘制出三种星际冰（水、二氧化碳、一氧化碳）的分布图，深入解析恒星诞生前的化学环境。这项研究不仅提升了空间解析度，也大幅增加样本数量，为理解恒星与行星的形成提供了关键新线索。在宇宙中寒冷的分子云中，这些充满气体与尘埃的区域正是恒星诞生的摇篮。微小的尘埃粒子常被一层层冰所覆盖，这些冰包含水、二氧化碳与一氧化碳等简单分子，是恒星与行星诞生过程中不可或缺的原料。如今，天文学家首次成功绘制出这些冰在整个分子云中的分布图，为我们提供了一扇前所未有的窗口，得以一窥恒星诞生之前的化学环境。 Nature Astronomy：Cospatial ice mapping of H2O with CO2 and CO across a molecular cloud with JWST/NIRCam 天文館：首次繪製星際冰地圖，揭開恆星誕生的化學起點
天文学家首度利用韦伯太空望远镜，针对蝘蜓座 I 分子云（Chamaeleon I molecular cloud）绘制出三种星际冰（水、二氧化碳、一氧化碳）的分布图，深入解析恒星诞生前的化学环境。这项研究不仅提升了空间解析度，也大幅增加样本数量，为理解恒星与行星的形成提供了关键新线索。在宇宙中寒冷的分子云中，这些充满气体与尘埃的区域正是恒星诞生的摇篮。微小的尘埃粒子常被一层层冰所覆盖，这些冰包含水、二氧化碳与一氧化碳等简单分子，是恒星与行星诞生过程中不可或缺的原料。如今，天文学家首次成功绘制出这些冰在整个分子云中的分布图，为我们提供了一扇前所未有的窗口，得以一窥恒星诞生之前的化学环境。 Nature Astronomy：Cospatial ice mapping of H2O with CO2 and CO across a molecular cloud with JWST/NIRCam 天文館：首次繪製星際冰地圖，揭開恆星誕生的化學起點
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Bitcoin is built on a distributed digital record called a blockchain. As the name implies, blockchain is a linked body of data, made up of units called blocks that contain information about each and every transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Entries are strung together in chronological order, creating a digital chain of blocks. “Once a block is added to the blockchain, it becomes accessible to anyone who wishes to view it, acting as a public ledger of cryptocurrency transactions,” says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means it’s not controlled by any one organization. “It’s like a Google Doc that anyone can work on,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Nobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.”
