保护地球，探索宇宙，发现文明
如果没有恒星，宇宙将是一个非常无聊的地方。如果没有它们，宇宙将仍然是一个来自大爆炸的氢和氦的弥散等离子体。 作为宇宙的基本组成部分，恒星核聚变炉锻造出新的重元素，丰富它们的母体星系。来自恒星的辐射能可能在最适宜的行星上孕育生命，就像在地球上一样。 为了更好地了解恒星和恒星演化，位于马里兰州巴尔的摩的太空望远镜科学研究所(STScI)与美国宇航局的哈勃太空望远镜启动了一项雄心勃勃的新计划，名为ULLYSES(UV Legacy Library of Young star，作为基本标准的年轻恒星紫外线遗产库)。 这是大麦哲伦星云（LMC）的地面望远镜照片，该星云是我们银河系的卫星星系。该星系是美国宇航局哈勃太空望远镜ULLYSES(作为基本标准的年轻恒星紫外线遗产库)新计划的几个选定目标之一。该计划正在研究300多...
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...
This image, taken with the NASA/ESA Hubble Space Telescope, depicts a special class of star-forming nursery known as Free-floating Evaporating Gaseous Globules, or frEGGs for short. This object is formally known as J025157.5+600606. When a massive new star starts to shine while still within the cool molecular gas cloud from which it formed, its energetic rad...
空间站下一批乘员出发前往发射地；新一批货资发射抵达空间站；准备好进行某种首次空间站乘员轮换任务……最近新闻速递，尽在「本周NASA」！ Credit：NASA 9月27日，包括NASA凯特·鲁宾斯（Kate Rubins）在内的空间站第64号远征队（Expedition 64）成员参加了在俄罗斯星城举行的传统发射前典礼，并前往哈萨克斯坦的拜科努尔航天发射场（Baikonur Cosmodrome）完成训练。鲁宾斯与俄罗斯宇航员谢尔盖·雷吉科夫（Sergey Ryzhikov）和谢尔盖·库德·斯维奇科夫（Sergey Kud-Sverchkov）计划于10月14日发射前往空间站。 Credit：NASA 诺斯罗普·格鲁曼公司（Northrop Grumman）的天鹅座（Cygnus）货运飞船于10月2日从NASA...
This stunning image by the NASA/ESA Hubble Space Telescope features the spiral galaxy NGC 5643 in the constellation of Lupus (the Wolf). Looking this good isn’t easy; 30 different exposures, for a total of nine hours of observation time, together with the high resolution and clarity of Hubble, were needed to produce an image of such high level of detail and ...
Resting on the tail of the Great Bear in the constellation of Ursa Major lies NGC 5585, a spiral galaxy that is more than it appears. The many stars and clouds of dust and gas that make up NGC 5585, shown here in this Hubble image, contribute only a small fraction of the total mass of the galaxy. As in many galaxies, this discrepancy can be explained by the ...
Many colorful stars are packed close together in this image of the globular cluster NGC 1805, taken by the NASA/ESA Hubble Space Telescope. This tight grouping of thousands of stars is located near the edge of the Large Magellanic Cloud, a satellite galaxy of our own Milky Way. The stars orbit closely to one another, like bees swarming around a hive. In the ...
2020年9月13日 M2-9: Wings of a Butterfly Nebula Image Credit: Hubble Legacy Archive, NASA, ESA – Processing: Judy Schmidt Explanation: Are stars better appreciated for their art after they die? Actually, stars usually create their most artistic displays as they die. In the case of low-mass stars like our Sun and M2-9 pictured here, the stars transform the...
美国航空航天局（NASA）哈勃空间望远镜的观测结果表明，红超巨星（red supergiant）参宿四（Betelgeuse，又称猎户座α星，α Orionis）的意外变暗很可能是由于大量热物质喷射到太空中，形成的尘埃云阻挡了参宿四表面的星光而造成的。 哈勃的研究团队认为，从恒星表面大型对流单元的上升流中释放出的超高温等离子体，在穿过高温大气到达温度较低的外层大气时，降温冷却形成了尘埃颗粒，进而产生了尘埃云。从2019年末开始，这些尘埃云阻挡了大约四分之一从恒星表面射出的光线，直到2020年4月，恒星才恢复了正常亮度。 参宿四是一颗年迈的红超巨星，由于它的内核中复杂而变化多端的核聚变反应，参宿四的大小已经发生了膨胀。现在的参宿四是如此之大，如果把它放在我们太阳系中心太阳的位置上，它的外表面将延伸到超过木星轨道的...
While appearing as a delicate and light veil draped across the sky, this image from the NASA/ESA Hubble Space Telescope actually depicts a small section of the Cygnus supernova blast wave, located around 2,400 light-years away. The name of the supernova remnant comes from its position in the northern constellation of Cygnus (the Swan), where it covers an are...