保护地球，探索宇宙，发现文明
NASA astronaut Kate Rubins points to the International Space Station’s “voting booth” where she cast her vote from space this month. This is actually Rubins’ second time to vote from low-Earth orbit, having cast her first vote from space in 2016 when she was an Expedition 48-49 crew member. Voting in space has been possible since 1997...
This illustration shows Jezero Crater — the landing site of the Mars 2020 Perseverance rover — as it may have looked billions of years go on Mars, when it was a lake. An inlet and outlet are also visible on either side of the lake. A key objective for Perseverance’s mission on Mars is astrobiology, including the search for signs of ancient microbial li...
2020年10月27日 Venusian Volcano Imagined Illustration Credit: NASA, JPL-Caltech, Peter Rubin Explanation: What would an erupting volcano on Venus look like? Evidence of currently active volcanoes on Venus was announced earlier this year with the unexplained warmth of regions thought to contain only ancient volcanoes. Although large scale images of Venus have be...
2020年10月26日 Reflections of the Ghost Nebula Image Credit & Copyright: Bogdan Jarzyna Explanation: Do any shapes seem to jump out at you from this interstellar field of stars and dust? The jeweled expanse, filled with faint, starlight-reflecting clouds, drifts through the night in the royal constellation of Cepheus. Far from your own neighborhood on plan...
2020年10月25日 Dark Matter in a Simulated Universe Illustration Credit & Copyright: Tom Abel & Ralf Kaehler (KIPAC, SLAC), AMNH Explanation: Is our universe haunted? It might look that way on this dark matter map. The gravity of unseen dark matter is the leading explanation for why galaxies rotate so fast, why galaxies orbit clusters so fast, why grav...
2020年10月24日 Globular Star Cluster 47 Tuc Image Credit & Copyright: Jose Mtanous Explanation: Globular star cluster 47 Tucanae is a jewel of the southern sky. Also known as NGC 104, it roams the halo of our Milky Way Galaxy along with some 200 other globular star clusters. The second brightest globular cluster (after Omega Centauri) as seen from planet E...
In this spectacular image captured by the NASA/ESA Hubble Space Telescope, the galaxy NGC 2799 (on the left) is seemingly being pulled into the center of the galaxy NGC 2798 (on the right). Interacting galaxies, such as these, are so named because of the influence they have on each other, which may eventually result in a merger or a unique formation. Already...
An array of 960 microphones is seen here off the end of runway 11 at Boeing’s research facility near Glasgow, Montana. The microphones were used by NASA to record the sound of a low-flying 787-10 Dreamliner passing overhead as part of the Chicago-based company’s 2020 ecoDemonstrator program during late August and early September. NASA researchers are studyin...
这组三张照片是由飞船的SamCam相机于2020年10月22日拍摄的，显示了NASA的OSIRIS-REx的采样器头部充满了从小行星贝努表面收集的岩石和尘埃。他们还显示，这些颗粒中的一些正在慢慢地从采样器头部逃逸。OSIRIS-REx团队的分析表明，一些物质穿过了头部的薄膜瓣略微楔形打开的小缝隙。聚拉膜瓣(环内左侧黑色凸起处)的设计目的是将收集的物质锁在里面，这些未封闭的区域似乎是由于较大的岩石没有完全穿过聚拉膜瓣造成的。根据现有的图像，研究小组怀疑在头部中有大量的样本，并且正在尽快将样本储存起来。 影像来源:美国国家航空航天局 10月22日，星期四，NASA的OSIRIS-REx任务团队在碰触贝努小行星后两天收到的图像证实，这些图片证实飞船已经收集了足够多的样本，以满足其主要任务的要求——获取至少2盎司(60...
2020年10月23日 Supernova in NGC 2525 Image Credit: NASA, ESA, A. Riess (STScI/JHU) and the SH0ES team Acknowledgment: M. Zamani (ESA/Hubble) Explanation: Big, beautiful, barred spiral galaxy NGC 2525 lies 70 million light-years from the Milky Way. It shines in Earth’s night sky within the boundaries of the southern constellation Puppis. About 60,000 light...