保护地球，探索宇宙，发现文明
2022年5月26日 NGC 4565: Galaxy on Edge Image Credit & Copyright: Michael Sherick Explanation: Magnificent spiral galaxy NGC 4565 is viewed edge-on from planet Earth. Also known as the Needle Galaxy for its narrow profile, bright NGC 4565 is a stop on many telescopic tours of the northern sky, in the faint but well-groomed constellation Coma Berenices. This...
Since the days of NASA’s Apollo program, astronauts have documented (and contended with) how liquids behave differently in microgravity than they do on Earth – coalescing into floating spheres instead of bottom-heavy droplets. Now, researchers have demonstrated this effect with a much more exotic material: gas cooled to nearly absolute zero (minus 459 degree...
2022年5月25日 The Lively Center of the Lagoon Nebula Image Credit: NASA, ESA, Hubble; Processing & Copyright: Mehmet Hakan Özsaraç Explanation: The center of the Lagoon Nebula is a whirlwind of spectacular star formation. Visible near the image center, at least two long funnel-shaped clouds, each roughly half a light-year long, have been formed by extreme ...
在这个概念图中描绘的衍射太阳帆可以使任务能够到达难以到达的地方，比如太阳两极上空的轨道。 影像来源：MacKenzi Martin 编者注：此版本已于5月24日更新，包括有关该项目合作研究员的信息。 随着NASA的探索不断推进，该机构选择的新太阳帆概念将被用于一项示范任务，它可以将科学推向新的高度。 衍射太阳帆项目被选为NASA创新先进概念（NASA Innovative Advanced Concepts, NIAC）项目的第三阶段研究。第三阶段旨在对NIAC概念进行战略转型，为NASA、其他政府机构或商业合作伙伴带来最大的潜在影响。 “随着我们比以往任何时候都更深入地探索宇宙，我们将需要创新的尖端技术来推动我们的任务。”NASA局长比尔·纳尔逊说。“NASA创新先进概念计划有助于释放远见卓识的想法，如新颖的...
NASA’s InSight Mars lander took this final selfie on April 24, 2022, the 1,211th Martian day, or sol, of the mission. The lander is covered with far more dust than it was in its first selfie, taken in December 2018, not long after landing – or in its second selfie, composed of images taken in March and April 2019. The arm now needs to move several time...
2022年5月24日 A Deep Sky Behind an Eclipsed Moon Image Credit & Copyright: Andrei Ionut Dascalu Explanation: The plan was to capture a picturesque part of the sky that was hosting an unusual guest. The result included a bonus — an additional and unexpected guest. The beautiful background features part of the central band of our Milky Way galaxy on the far ...
This Hubble Space Telescope image shows a section of the spiral galaxy nicknamed the Needle’s Eye – an appropriately diminutive name for a dwarf spiral galaxy. The Needle’s Eye, also known as NGC 247 and Caldwell 62, is located about 11 million light-years away in the Sculptor Group – the closest group of galaxies to our own (the Local Group). The galaxy was...
2022年5月23日 The Once and Future Stars of Andromeda Image Credit: NASA, NSF, NOAJ, Hubble, Subaru, Mayall, DSS, Spitzer; Processing & Copyright: Robert Gendler & Russell Croman Explanation: This picture of Andromeda shows not only where stars are now, but where stars will soon be. Of course, the big, beautiful Andromeda Galaxy, M31, is a spiral galax...
NASA的露西号宇宙飞船从一个独特的有利位置观测了2022年5月15日至16日的月全食，该位置距离地球6,400万英里（1亿公里），接近地球与太阳之间距离的70%。通过高分辨率全色相机L’LORRI，露西能够看到地球在月球上投射阴影。在这个距离上，地球和月球的距离在露西看来只有0.2度，就像我们从四分之一英里(400米)外观看汽车尾灯一样。 影像来源：NASA/Goddard/APL/SwRI 在这段延时摄影视频中，地球在左边（其旋转清晰可见），而月球（在右边，亮度增加了六倍以增加其可见性）在进入地球阴影时从视野中消失。这段视频覆盖了将近三个小时，从5月15日美国东部时间下午9:40到5月16日美国东部时间上午12:30。在月球从阴影中出现之前，观测就结束了。 露西号宇宙飞船于2021年10月发射。...
2022年5月22日 A Large Tsunami Shock Wave on the Sun Image Credit: NSO/AURA/NSF and USAF Research Laboratory Explanation: Tsunamis this large don’t happen on Earth. During 2006, a large solar flare from an Earth-sized sunspot produced a tsunami-type shock wave that was spectacular even for the Sun. Pictured here, the tsunami wave was captured moving out fr...