心宿二附近的恒星、尘埃和气体

心宿二附近的恒星、尘埃和气体

ByNASA中文

2022年1月26日 Stars, Dust, and Gas Near Antares Image Credit & Copyright: Mario Cogo (Galax Lux) Explanation: Why is the sky near Antares and Rho Ophiuchi so dusty yet colorful? The colors result from a mixture of objects and processes. Fine dust — illuminated from the front by starlight — produces blue reflection nebulae. Gaseous clouds whose atoms are excited by ultraviolet starlight produce reddish emission nebulae. Backlit dust clouds block starlight and so appear dark. Antares, a red supergiant and one of the brighter stars in the night sky, lights up the yellow-red clouds on the lower right of the featured image. The Rho Ophiuchi star system lies at the center of the blue reflection nebula on the top left. The distant globular cluster of…

心宿增四星云的美丽云气

心宿增四星云的美丽云气

ByNASA中文

2020年10月14日 The Colorful Clouds of Rho Ophiuchi Image Credit & Copyright: Amir H. Abolfath Explanation: The many spectacular colors of the Rho Ophiuchi (oh’-fee-yu-kee) clouds highlight the many processes that occur there. The blue regions shine primarily by reflected light. Blue light from the Rho Ophiuchi star system and nearby stars reflects more efficiently off this portion of the nebula than red light. The Earth’s daytime sky appears blue for the same reason. The red and yellow regions shine primarily because of emission from the nebula’s atomic and molecular gas. Light from nearby blue stars – more energetic than the bright star Antares – knocks electrons away from the gas, which then shines when the electrons recombine with the gas. The dark brown regions are…

烟斗星云

烟斗星云

ByNASA中文

2020年8月7日 The Pipe Nebula Image Credit & Copyright: Jose Mtanos Explanation: East of Antares, dark markings sprawl through crowded star fields toward the center of our Milky Way Galaxy. Cataloged in the early 20th century by astronomer E. E. Barnard, the obscuring interstellar dust clouds include B59, B72, B77 and B78, seen in against the starry background. Here, their combined shape suggests a pipe stem and bowl, and so the dark nebula’s popular name is the Pipe Nebula. The deep and expansive view covers a full 10 by 10 degree field in the pronounceable constellation Ophiuchus. The Pipe Nebula is part of the Ophiuchus dark cloud complex located at a distance of about 450 light-years. Dense cores of gas and dust within the Pipe Nebula…

极端的黑洞爆发

极端的黑洞爆发

ByNASA中文

2020 March 11 An Extreme Black Hole Outburst Image Credit: X-ray: Chandra: NASA/CXC/NRL/S. Giacintucci, et al., XMM-Newton: ESA/XMM-Newton; Radio: NCRA/TIFR/GMRT; Infrared: 2MASS/UMass/IPAC-Caltech/NASA/NSF; Text: Michael F. Corcoran (NASA, Catholic U., HEAPOW) Explanation: Astronomers believe they have now found the most powerful example of a black hole outburst yet seen in our Universe. The composite, false-color featured image is of a cluster of galaxies in the constellation of Ophiuchus, the serpent-bearer. The composite includes X-ray images (from the Chandra X-ray Observatory and XMM-Newton) in purple, and a radio image (from India’s Giant Metrewave Radio Telescope) in blue (along with an infrared image of the galaxies and stars in the field in white for good measure). The dashed line marks the border of a cavity blown out by…

心宿增四星云的年轻恒星

心宿增四星云的年轻恒星

ByKen Chan

2019 November 17 Young Stars in the Rho Ophiuchi Cloud Image Credit: NASA, JPL-Caltech, WISE Explanation: How do stars form? To help find out, astronomers created this tantalizing false-color composition of dust clouds and embedded newborn stars in infrared wavelengths with WISE, the Wide-field Infrared Survey Explorer. The cosmic canvas features one of the closest star forming regions, part of the Rho Ophiuchi cloud complex some 400 light-years distant near the southern edge of the pronounceable constellation Ophiuchus. After forming along a large cloud of cold molecular hydrogen gas, young stars heat the surrounding dust to produce the infrared glow. Stars in the process of formation, called young stellar objects or YSOs, are embedded in the compact pinkish nebulae seen here, but are otherwise hidden…

木星和烟斗星云

木星和烟斗星云

ByNASA中文

2019 June 6 木星和烟斗星云 图片来源及版权：Alain Maury, Jean-Marc Mari 说明：现在，在星系丰富的星场和星云的映衬下，明亮的木星在夜空中闪耀。在这张中央银河系的彩色长焦照片中，木星压倒性的光芒在画面顶部闪耀。该场景横跨天空约20度，LDN 1773黑色的轮廓背对着星场，它们的组合勾勒出一个烟斗的颈和管形状，因此这片黑暗的星云也常被称为烟斗星云。烟斗星云是蛇夫座星云的一部分。蛇夫座星云位于450光年外，致密的气体和尘埃核心正在坍缩形成恒星。6月12日，木星在天空中的正对着太阳，距离地球只有36光分。天文爱好者或许能在天空中木星强光左下方的深色斑纹里看到蛇状星云。 The Planet and the Pipe Image Credit & Copyright: Alain Maury, Jean-Marc Mari Explanation: Now posing against our galaxy’s rich starfields and nebulae, brilliant planet Jupiter shines in the night sky. Its almost overwhelming glow is near the top of the frame in this colorful telephoto portrait of the central Milky Way. Spanning about 20 degrees on the sky, the scene includes the silhouette of LDN 1773 against the starlight, also know by the popular moniker the Pipe Nebula for its apparent outline of stem and bowl. The Pipe Nebula is part of the galaxy’s Ophiuchus dark cloud complex. Located at a distance of about 450 light-years, dense cores of gas and dust within are…