Group 1 - The research team led by Hokkaido University has successfully determined the formation time of the materials constituting the asteroid "Ryugu," which is approximately 4.5673 billion years ago, shortly after the birth of the solar system [1][2] - The study indicates that the original solid materials of celestial bodies provide crucial insights into their origins, with previous analyses showing that the minerals from "Ryugu" were formed around 4.562 billion years ago from low-temperature aqueous solutions [1] - The research utilized scanning electron microscopy to analyze "Ryugu" samples, revealing the presence of calcium-aluminum inclusions formed in high-temperature regions exceeding 1000 degrees Celsius in the early solar system [2] Group 2 - The study found that the sizes of calcium-aluminum inclusions in "Ryugu" rock samples are generally below 0.1 millimeters, while those in other carbonaceous chondrites are relatively larger, suggesting a connection to the transport processes of early solar system solid materials [2] - This discovery provides valuable data for understanding the origins of the solar system and planet formation, potentially advancing related research [2]

郑州大学资产与财务部环境球差校正透射电子显微镜项目 一、项目基本情况 最高限价：31000000元 | | 包号 | 包名称 | 包预算(元) | 包最高限价(元) | | --- | --- | --- | --- | --- | | | 豫政采(2)20250347-1 | 郑州大学资产与财务部环境球差校 正透射电子显微镜项目 | 31000000 | 31000000 | | 序 름 1 | | | | | 5、采购需求（包括但不限于标的的名称、数量、简要技术需求或服务要求等） 导读： 郑州大学资产与财务部环境球差校正透射电子显微镜采购项目，预算金额分别为：31,000,000.00元，42,450,000.00元 特别提示 微信公众号机制调整，请点击顶部"仪器信息网" → 右上方"…" → 设为 ★ 星标，否则很可能无法看到我们的推送。 5.1采购内容：环境球差校正透射电子显微镜（1套）5.2交货期：自合同签订生效之日起540日历天。5.3交货地点：采购人指定地 点。5.4质量标准：合格，符合国家、行业规定的规范标准。5.5质量保证期：自验收合格之日起国产设备质量保证期3年，进口设备 质量保证期1年。 ...