保护地球，探索宇宙，发现文明
2023年1月31日 A Triple View of Comet ZTF Image Credit & Copyright: Javier Caldera & Miguel Gracia Explanation: Comet ZTF has a distinctive shape. The now bright comet visiting the inner Solar System has been showing not only a common dust tail, ion tail, and green gas coma, but also an uncommonly distinctive antitail. The antitail does not actually le...
十个样本管，捕捉了惊人的火星地质变化，已经被放置在火星表面，以便将来在地球上研究。
Chile’s Villarrica volcano emits steam and other volcanic gases in this photo taken from the International Space Station on Jan. 17, 2023. The gases come from a series of minor explosions—called Strombolian eruptions—that have been ongoing at Villarrica since October 2022. Located along Chile’s southern Andes, Villarrica is one of the most active and dangero...
2023年1月30日 Globular Star Cluster NGC 6355 from Hubble Image Credit: ESA/Hubble & NASA, E. Noyola, R. Cohen Explanation: Globular clusters once ruled the Milky Way. Back in the old days, back when our Galaxy first formed, perhaps thousands of globular clusters roamed our Galaxy. Today, there are less than 200 left. Over the eons, many globular clusters w...
在一项高精度的观测壮举中，科学家们利用NASA詹姆斯·韦伯太空望远镜的一项新技术，拍摄到了查里克洛薄环所投射的星光阴影。查里克洛是一个冰冷的小天体，但却是已知的半人马小行星中最大的一个，位于土星轨道外20亿英里之外。查里克洛的直径仅为160英里（250公里），比地球的直径小51倍，其环距天体中心约250英里（400公里）。
2023年1月29日 Barnard 68: Dark Molecular Cloud Image Credit: FORS Team, 8.2-meter VLT Antu, ESO Explanation: Where did all the stars go? What used to be considered a hole in the sky is now known to astronomers as a dark molecular cloud. Here, a high concentration of dust and molecular gas absorb practically all the visible light emitted from background stars. T...
科学家利用NASA费米伽马射线太空望远镜的数据，首次发现了来自一种特殊类型双星系统的伽马射线日食。这些所谓的蜘蛛系统中，每一个都包含一颗脉冲星——一颗在超新星中爆炸的恒星的超高密度、快速旋转的残骸——它会慢慢侵蚀它的伴星。 一个国际科学家团队通过费米望远镜的十多年观测，找到了七只经历日食的蜘蛛系统，从我们的角度来看，当低质量伴星经过脉冲星前时，就会发生日食。这些数据使他们能够计算出蜘蛛系统相对于我们视线和其他信息的倾斜程度。 “研究蜘蛛系统最重要的目标之一是尝试测量脉冲星的质量。”领导这项工作的德国汉诺威马克斯普朗克引力物理研究所天体物理学家科林·克拉克说。“脉冲星基本上是我们所能测量到的密度最大的物质球体。它们所能达到的最大质量限制了这些极端环境中的物理现象，这在地球上是无法复制的。” 有关这项研究的论文发表...
2023年1月28日 Comet ZTF over Mount Etna Image Credit & Copyright: Dario Giannobile Explanation: Comet-like plumes are blowing over the volcanic peaks of Mount Etna in this wintry mountain-and-skyscape from planet Earth. The stacked and blended combination of individual exposures recorded during the cold night of January 23, also capture naked-eye Comet ZTF...
The bright variable star V 372 Orionis takes center stage in this image from the NASA/ESA Hubble Space Telescope, which has also captured a smaller companion star in the upper left of this image. Both stars lie in the Orion Nebula, a colossal region of star formation roughly 1,450 light-years from Earth. V 372 Orionis is a particular type of variable star kn...
NASA Administrator Bill Nelson lays a wreath at the Space Shuttle Challenger Memorial during NASA’s Day of Remembrance, Thursday, Jan. 26, 2023, at Arlington National Cemetery in Arlington, Va. Wreaths were laid in memory of those men and women who lost their lives in the quest for space exploration. Credit: NASA/Aubrey Gemignani 2023年1月26日星期四，在弗吉尼亚州阿灵...