保护地球，探索宇宙，发现文明
This photograph shows ripples in the surface of Denman Glacier in East Antarctica that throw shadows against the ice. The glacier is melting at a faster rate now than it was from 2003 to 2008. The glacier retreated 3.4 miles (5.4 kilometers) from 1996 to 2018, according to a new study by scientists at NASA’s Jet Propulsion Laboratory and the University...
NASA’s new three-dimensional portrait of methane, the world’s second-largest contributor to greenhouse warming, shows it arising from a diversity of sources on the ground and how it moves through the atmosphere. Combining multiple data sets from emissions inventories, including fossil fuel, agricultural, biomass burning and biofuels, and simulations of wetla...
In this image from Dec. 2019, astronaut Christina Koch handles media bags that enable the manufacturing of organ-like tissues using the BioFabrication Facility (BFF), a 3-D biological printer on the International Space Station. The BFF could become a part of a larger system capable of manufacturing whole, fully functioning human organs from existing patient ...
2020 March 26 Andromeda Station Composite Image Credit & Copyright: Ralf Rohner Explanation: This surreal picture isn’t from a special effects sci-fi movie. It is a digital composite of frames of the real Andromeda Galaxy, also known as M31, rising over a real mountain. Exposures tracking the galaxy and background stars have been digitally combine...
2020 March 25 Star Forming Region S106 Image Credit: NASA, ESA, Hubble Legacy Archive; Processing & Copyright: Utkarsh Mishra Explanation: Massive star IRS 4 is beginning to spread its wings. Born only about 100,000 years ago, material streaming out from this newborn star has formed the nebula dubbed Sharpless 2-106 Nebula (S106), featured here. A large...
克里斯蒂安·惠更斯（Christiaan Huygens ） Credit：NASA 1655年3月25日，荷兰数学家和天文学家克里斯蒂安·惠更斯发现了灭霸的故乡（虚构），土卫六泰坦。 当年惠更斯在观察土星环时，注意到附近有一个明亮的小点，随后经过几天的确认，证实这个小点在环绕土星运行，确认新发现了一个土星的卫星。土卫六是土星最大的卫星，也是土星截止目前82颗卫星中最先发现的。 杰拉德·柯伊伯（Gerard Kuiper），1960年，柯伊伯在亚利桑那州创建了月球与行星实验室。 Credit:NASA 近300年后，1944年，荷兰美籍天文学家杰拉德·柯伊伯发现土卫六具有与众不同的特征之一，这颗遥远的土星卫星拥有大气层。 土卫六上反射的太阳光通过光谱仪后，柯伊伯从中检测到了甲烷的存在，地基望远镜的进一步观测，证...
The central region of our galaxy, the Milky Way, contains an exotic collection of objects, including a supermassive black hole weighing about 4 million times the mass of the Sun (called Sagittarius A*), clouds of gas at temperatures of millions of degrees, neutron stars and white dwarf stars tearing material from companion stars and beautiful tendrils of rad...
2020 March 24 A Black Hole Disrupts a Passing Star Illustration Credit: NASA, JPL-Caltech Explanation: What happens to a star that goes near a black hole? If the star directly impacts a massive black hole, then the star falls in completely — and everything vanishes. More likely, though, the star goes close enough to have the black hole’s gravity ...
2020 March 23 From the Pleiades to the Eridanus Loop Image Credit & Copyright: Hirofumi Okubo Explanation: If you stare at an interesting patch of sky long enough, will it look different? In the case of Pleiades and Hyades star clusters — and surrounding regions — the answer is: yes, pretty different. Long duration camera exposures reveal an...
NASA谈及冠状病毒大流行；通过在线资讯了解NASA动态；猎户座飞船进行了更多的测试……最近新闻速递，尽在「本周NASA」！