保护地球, 探索宇宙, 发现文明
2023年1月8日 Where Your Elements Came From Image Credit & License: Wikipedia: Cmglee; Data: Jennifer Johnson (OSU) Explanation: The hydrogen in your body, present in every molecule of water, came from the Big Bang. There are no other appreciable sources of hydrogen in the universe. The carbon in your body was made by nuclear fusion in the interior of stars...
欧洲航天局和俄罗斯联邦太空局的ExoMars微量气体轨道器在火星引人注目的峡谷系统水手谷的中心发现了大量的水。 这些隐藏在火星表面下的水是由跟踪气体轨道器（TGO）的FREND仪器发现，该仪器正在绘制火星土壤最上层一米中的氢含量图（一种测量水含量的方法）。 火星上的跟踪气体轨道器 影像来源：ESA 虽然已知火星上存在水，但在火星寒冷的极地地区发现的水大部分以冰的形式存在。在赤道附近的火星表面没有发现水冰，因为这里的温度不足以使暴露的水冰保持稳定。 包括欧洲航天局的火星快车号在内的任务已经在火星低纬度地区寻找近地表的水，并发现了少量的水。近地表水是土壤中覆盖灰尘颗粒或被锁在矿物质中的冰。然而，这类研究只探索了火星的表面；火星地下可能存在被灰尘覆盖的更深的冰库。 “通过TGO，我们可以向下看这个尘土层以下一米，看看...
2021年9月30日 The Hydrogen Clouds of M33 Image Credit & Copyright: Luca Fornaciari Explanation: Gorgeous spiral galaxy M33 seems to have more than its fair share of glowing hydrogen gas. A prominent member of the local group of galaxies, M33 is also known as the Triangulum Galaxy and lies a mere 3 million light-years away. Sprawling along loose spiral arms...
2020年11月30日 Cygnus Without Stars Image Credit & Copyright: Bowen James Cameron Explanation: The sky is filled with faintly glowing gas, though it can take a sensitive camera and telescope to see it. For example, this twelve-degree-wide view of the northern part of the constellation Cygnus reveals a complex array of cosmic clouds of gas along the plane o...