保护地球，探索宇宙，发现文明
2022年6月20日 Rock Fingers on Mars Image Credit: NASA, JPL-Caltech, MSSS Explanation: There, just right of center, what is that? The surface of Mars keeps revealing new surprises with the recent discovery of finger-like rock spires. The small nearly-vertical rock outcrops were imaged last month by the robotic Curiosity rover on Mars. Although similar in size an...
The issue of General Order No. 3 by Union troops on June 19, 1865, marked the official end of slavery in Texas and the U.S. On that Monday, enslaved African Americans in Texas learned of their freedom. That day of liberation became known as Juneteenth, when the Emancipation Proclamation was announced by Union troops in Galveston, Texas. On Thursday, June 17,...
2022年6月19日 Game: Super Planet Crash Game Credit & License: Stefano Meschiari (U. Texas at Austin) & the SAVE/Point Team Explanation: Can you create a planetary system that lasts for 1000 years? Super Planet Crash, the featured game, allows you to try. To create up to ten planets, just click anywhere near the central star. Planet types can be select...
2022年6月18日 The Gamma Cygni Nebula Image Credit & Copyright: Min Xie, Chen Wu, Yizhou Zhang, and Benchu Tang Explanation: Supergiant star Gamma Cygni is at the center of the Northern Cross. Near the plane of our Milky Way galaxy, that famous asterism flies high in northern summer night skies in the constellation Cygnus the Swan. Known by the proper name ...
2022年6月17日 Good Morning Planets from Chile Image Credit & Copyright: Elke Schulz (Daniel Verschatse Observatory) Explanation: On June 15, innermost planet Mercury had wandered about as far from the Sun as it ever gets in planet Earth’s sky. Near the eastern horizon just before sunrise it stands over distant Andes mountain peaks in this predawn sna...
一颗恒星的死亡痛苦剧烈地扰乱了它的行星系，以至于留下的死恒星，即白矮星，正在吸走系统内外的碎片。这是天文学家首次观测到白矮星同时消耗岩石金属和冰质物质，这是行星的组成成分。 NASA哈勃太空望远镜和其他NASA观测站的档案数据对于诊断这起宇宙同类相食案件至关重要。这些发现有助于描述演化行星系统的剧烈性质，并可以告诉天文学家新形成系统的组成。 这些发现是基于对附近白矮星G238-44大气中捕获的物质的分析。白矮星是像我们的太阳一样的恒星在核聚变过程中，外层脱落并停止燃烧燃料后的残留物。“我们从未见过这两种物体同时吸积到一颗白矮星上。”首席研究员、加州大学洛杉矶分校本科毕业生特德·约翰逊说。“通过研究这些白矮星，我们希望对仍然完整的行星系统有更好地了解。” 这一发现也很有趣，因为人们认为小型冰状天体撞击并“灌溉”了...
The Progress Pride flag is seen flying at the Mary W. Jackson NASA Headquarters Building, Thursday, June 9, 2022, in Washington, DC. In recognition of LGBTQ+ Pride Month, the Progress Pride flag will be flown outside of the agency’s headquarters for the month of June. Image Credit: NASA/Joel Kowsky 2022年6月9日，星期四，华盛顿特区，进步骄傲旗在玛丽·杰克逊NASA总部大楼飘扬。为表彰LGBTQ+自豪月，6月份将...
2022年6月16日 Strawberry Supermoon from China Image Credit & Copyright: Jeff Dai (TWAN) Explanation: There are four Full Supermoons in 2022. Using the definition of a supermoon as a Full Moon near perigee, that is within at least 90% of its closest approach to Earth in a given orbit, the year’s Full Supermoon dates are May 16, June 14, July 13, and A...
The brilliant cascade of stars through the middle of this image is the galaxy ESO 318-13 as seen by the Hubble Space Telescope in this image from 2012. Despite being located millions of light-years from Earth, the stars captured in this image are so bright and clear one could almost attempt to count them. ESO 318-13 is sandwiched between a vast collection of...
2022年6月15日 In the Heart of the Virgo Cluster Image Credit & Copyright: Saulius Adomaitis Explanation: The Virgo Cluster of Galaxies is the closest cluster of galaxies to our Milky Way Galaxy. The Virgo Cluster is so close that it spans more than 5 degrees on the sky – about 10 times the angle made by a full Moon. With its heart lying about 70 mill...