保护地球，探索宇宙，发现文明
In this June 2021 image, our Sun’s glint beams off the Indian Ocean as the International Space Station orbited about 270 miles above the Earth near western Australia. The station orbits the Earth about every 90 minutes at a speed of more than 17,000 miles per hour. Image Credit: NASA 在这张2021年6月拍摄的照片中，国际空间站在靠近澳大利亚西部的地球上空约270英里处环绕运行，太阳的光芒在印度洋上方闪耀。空间站每90分...
2021年06月24日 Messier 99 Image Credit: NASA, ESA, Hubble, Janice Lee; Processing & Copyright: Leo Shatz Explanation: Grand design spiral galaxy Messier 99 looks majestic on a truly cosmic scale. This recently processed full galaxy portrait stretches over 70,000 light-years across M99. The sharp view is a combination of ultraviolet, visible, and infrared i...
2021年06月23日 STARFORGE: A Star Formation Simulation Video & Text Credit: Michael Y. Grudić (Northwestern U.) et al., STARFORGE Collaboration; Music: Prelude, Op. 28, No. 4 in E Minor (Frédéric Chopin) Explanation: How do stars form? Most form in giant molecular clouds located in the central disk of a galaxy. The process is started, influenced, and limite...
Spacewalkers Shane Kimbrough of NASA (left) and Thomas Pesquet of the European Space Agency worked to install new roll out solar arrays on the International Space Station’s P-6 truss structure. This latest spacewalk took place on Sunday, June 20, 2021. During the eighth spacewalk of the year, the pair completed the deployment of a new ISS Roll-Out Sola...
这张地图显示了由哨兵6号迈克尔·弗雷里奇卫星(Sentinel-6 Michael Freilich)从6月5日到15日测量的海平面。红色区域表示海平面高于正常水平的区域，蓝色区域表示海平面低于正常水平的区域。 图片来源:NASA地球观测站 哨兵6号迈克尔·弗雷里奇卫星(Sentinel-6 Michael Freilich)，最新的监测海面高度的卫星，向用户发布了它的第一批科学测量数据。 在轨道上经过六个月的检查和校准后，哨兵6号迈克尔·弗雷里奇卫星将于6月22日向公众提供其首批两个数据流。它于2020年11月21日从加州范登堡空军基地发射，是一个美欧合作项目，用于测量海面高度和其他关键海洋特征，如海面风速和波浪高度。 其中一个海面高度数据流将要发布，精确到2.3英寸(5.8厘米)，并将在哨兵6号迈克尔·弗雷...
2021年06月22日 HD 163296: Jet from a Star in Formation Image Credit: Visible: VLT/MUSE (ESO); Radio: ALMA (ESO/NAOJ/NRAO) Explanation: How are jets created during star formation? No one is sure, although recent images of the young star system HD 163296 are quite illuminating. The central star in the featured image is still forming but seen already surrounded by...
NASA Expedition 65 astronaut Shane Kimbrough is pictured during the Friday, June 18, 2021, spacewalk to install new roll out solar arrays on the International Space Station’s P-6 truss structure. Image Credit: NASA 2021年6月18日星期五，NASA第65号远征队宇航员肖恩·金布罗在太空行走，为国际空间站的P-6桁架结构安装新的太阳能阵列。 图片来源:NASA
2021年06月21日 The Tadpole Galaxy from Hubble Image Credit: Hubble Legacy Archive, ESA, NASA; Processing: Amal Biju Explanation: Why does this galaxy have such a long tail? In this stunning vista, based on image data from the Hubble Legacy Archive, distant galaxies form a dramatic backdrop for disrupted spiral galaxy Arp 188, the Tadpole Galaxy. The cosmic tadp...
2021年06月20日 Sunrise Solstice over Stonehenge Image Credit & Copyright: Max Alexander, STFC, SPL Explanation: Today the Sun reaches its northernmost point in planet Earth’s sky. Called a solstice, many cultures mark this date as a change of seasons — from spring to summer in Earth’s Northern Hemisphere and from fall to winter in Earth&#...
2021年06月19日 Northern Summer Twilight Image Credit & Copyright: Justin Anderson Explanation: Nights grow shorter and days grow longer as the summer solstice approaches in the north. Usually seen at high latitudes in summer months, noctilucent or night shining clouds begin to make their appearance. Drifting near the edge of space about 80 kilometers above...