Nebulae | Page 2 of 6

哈勃观测到猎户座星云中的双星

ByNASA中文 2023年1月28日

The bright variable star V 372 Orionis takes center stage in this image from the NASA/ESA Hubble Space Telescope, which has also captured a smaller companion star in the upper left of this image. Both stars lie in the Orion Nebula, a colossal region of star formation roughly 1,450 light-years from Earth. V 372 Orionis is a particular type of variable star known as an Orion Variable. These young stars experience some tempestuous moods and growing pains, which are visible to astronomers as irregular variations in luminosity. Orion Variables are often associated with diffuse nebulae, and V 372 Orionis is no exception; the patchy gas and dust of the Orion Nebula pervade this scene. This image overlays data from two of Hubble’s instruments. Data from…

NASA·每日一图

韦伯在船底星云中发现了年轻恒星的爆发

ByNASA中文 2022年12月22日

By taking a closer look at one of Webb’s first images, the iconic Cosmic Cliffs, scientists have found dozens of energetic jets and outflows from young stars previously hidden by dust clouds. The discovery marks the beginning of a new era of investigating how stars like our Sun form, and how the radiation from nearby massive stars might affect the development of planets. The two dozen previously unknown outflows from extremely young stars were found by analyzing data from a specific wavelength of infrared light (4.7 microns). Webb’s observations uncovered a gallery of objects ranging from small fountains to burbling behemoths that extend light-years from the forming stars. Download the full-resolution, uncompressed version and supporting visuals from the Space Telescope Science Institute. Image Credit: NASA,…

NASA·每日一图

哈勃望远镜观测到一个布满恒星的宇宙云

ByNASA中文 2022年12月18日

A portion of the open cluster NGC 6530 appears as a roiling wall of smoke studded with stars in this image from the NASA/ESA Hubble Space Telescope. NGC 6530 is a collection of several thousand stars lying around 4,350 light-years from Earth in the constellation Sagittarius. The cluster is set within the larger Lagoon Nebula, a gigantic interstellar cloud of gas and dust. Hubble has previously imaged the Lagoon Nebula several times, including these images released in 2010 and 2011. It is the nebula that gives this image its distinctly smoky appearance; clouds of interstellar gas and dust stretch from one side of the image to the other. Astronomers investigated NGC 6530 using Hubble’s Advanced Camera for Surveys and Wide Field Planetary Camera 2. They…

资讯

NASA的詹姆斯·韦伯太空望远镜揭开了年轻恒星形成初期的面纱

ByNASA中文 2022年12月16日

科学家们“深入研究”韦伯望远镜的首批标志性图像之一，发现了数十个以前被尘埃云隐藏的年轻恒星的高能喷流和外流。这一发现标志着一个新时代的开始，即研究像太阳这样的恒星是如何形成，以及来自附近大质量恒星的辐射如何影响行星的发展。

资讯

NASA的詹姆斯·韦伯太空望远镜显示了几颗恒星“搅动”了南环星云

ByNASA中文 2022年12月9日

来自NASA詹姆斯·韦伯太空望远镜的第一批数据显示，至少有两颗，甚至可能有三颗看不见的恒星，塑造了南环星云的形成了南环星云的椭圆形、曲线形。此外，通过将韦伯的红外图像与欧洲航天局（ESA）盖亚天文台的现有数据配对，研究人员第一次能够在形成星云之前精确地确定中心恒星的质量。由澳大利亚悉尼麦考瑞大学的奥索拉·德·马尔科领导的近70名研究人员组成的团队分析了韦伯对这颗垂死恒星的10次高度详细的曝光，得出了这些结果。

NASA·每日一图

哈勃望远镜观测到一个正在膨胀的宇宙云

ByNASA中文 2022年11月19日

A small, dense cloud of gas and dust called CB 130-3 blots out the center of this image from the NASA/ESA Hubble Space Telescope. CB 130-3 is an object known as a dense core, a compact agglomeration of gas and dust. This particular dense core is in the constellation Serpens and seems to billow across a field of background stars. Dense cores like CB 130-3 are the birthplaces of stars and are of particular interest to astronomers. During the collapse of these cores enough mass can accumulate in one place to reach the temperatures and densities required to ignite hydrogen fusion, marking the birth of a new star. While it may not be obvious from this image, a compact object teetering on the brink of…

NASA·每日一图

哈勃太空望远镜发现神秘的宇宙“钥匙孔”

ByNASA中文 2022年11月3日

This peculiar portrait from the NASA/ESA Hubble Space Telescope showcases NGC 1999, a reflection nebula in the constellation Orion. NGC 1999 is around 1,350 light-years from Earth and lies near the Orion Nebula, the closest region of massive star formation to Earth. NGC 1999 itself is a relic of recent star formation – it is composed of debris left over from the formation of a newborn star. Just like fog curling around a streetlamp, reflection nebulae like NGC 1999 shine by the light from an embedded source. In the case of NGC 1999, this source is the aforementioned newborn star V380 Orionis, which is visible at the center of this image. The most notable aspect of NGC 1999’s appearance, however, is the conspicuous hole in…

NASA·每日一图

露齿葫芦装点银河

ByNASA中文 2022年11月1日

While observing the outer region of the Milky Way galaxy, our Spitzer Telescope captured this infrared image of a cloud of gas and dust that looks like the hollowed-out pumpkins we see every Halloween. Nicknamed the “Jack-o’-Lantern Nebula,” it was likely created by powerful outflows of radiation and particles from a massive O-type star, about 15 to 20 times heavier than the Sun. The data used to create this image was collected during Spitzer’s “cold mission,” which ran between 2004 and 2009. Image Credit: NASA/JPL-Caltech 在观测银河系外部区域时，NASA的斯皮策望远镜捕捉到了这张由气体和尘埃组成的云团的红外图像，它看起来就像我们每年万圣节都会看到的掏空的南瓜。它被称为“南瓜灯星云”，很可能是由一颗质量约为太阳15到20倍的大质量O型恒星的强大辐射和粒子外流形成。用于创建这张图像的数据是在2004年至2009年斯皮策的“冷任务”期间收集。影像来源：NASA/JPL-Caltech

NASA·每日一图

韦伯揭示了创生之柱的新细节

ByNASA中文 2022年10月29日

Our James Webb Space Telescope has captured a new image of the famous Pillars of Creation—first imaged by the Hubble Space Telescope in 1995—that reveals new details about the region. The three-dimensional pillars look like majestic rock formations but are far more permeable. These columns are made up of cool interstellar gas and dust that sometimes appear semi-transparent in near-infrared light. Webb’s new view of the Pillars of Creation will help researchers revamp their models of star formation by identifying far more precise counts of newly formed stars, along with the quantities of gas and dust in the region. Over time, they will begin to build a clearer understanding of how stars form and burst out of these dusty clouds over millions of years. Download…

资讯

詹姆斯·韦伯太空望远镜拍摄了充满恒星的创生之柱

ByNASA中文 2022年10月20日

在NASA詹姆斯·韦伯太空望远镜的近红外视图中，创生之柱呈现出万花筒般的色彩。这些柱子看起来像是从沙漠景观中升起的拱门和尖塔，但却充满了半透明的气体和尘埃，而且不断变化。这是一个年轻恒星正在形成的区域，或者说，在它们继续形成的过程中刚刚从它们的尘埃茧中破茧而出。影像来源：NASA, ESA, CSA, STScI; Joseph DePasquale (STScI), Anton M. Koekemoer (STScI), Alyssa Pagan (STScI). NASA的詹姆斯·韦伯太空望远镜拍摄到了一幅郁郁葱葱、非常详细的景观——标志性的创生之柱，在那里，新的恒星正在稠密的气体云和尘埃云中形成。这些三维柱子看起来像雄伟的岩层，但渗透性更强。这些柱状物由冷的星际气体和尘埃组成，它们有时在近红外光下呈半透明。 1995年，NASA哈勃太空望远镜首次拍摄到创生之柱（Pillars of Creation）的图像，使之声名鹊起。韦伯对创生之柱的新观点将帮助研究人员通过更精确地确定新形成恒星的数量，以及该地区气体和尘埃的数量，来改进恒星形成模型。随着时间的推移，他们将开始更清楚地了解数百万年来恒星是如何从这些尘土飞扬的云层中形成和爆发。 1995年，NASA哈勃太空望远镜首次拍摄到创生之柱（Pillars of Creation）的图像，使之声名鹊起。2014年，哈勃望远镜重新拍摄了这一场景，在可见光下展现了更清晰、更广阔的视野，如上图左图所示。NASA詹姆斯·韦伯太空望远镜拍摄的一幅新的近红外光图（见右图），帮助我们看到了这个恒星形成区域更多的尘埃。厚厚的、灰蒙蒙的棕色恒星柱不再那么不透明，更多仍在形成的红色恒星出现在我们的视野中。影像来源：NASA, ESA, CSA, STScI; Joseph DePasquale (STScI), Anton M. Koekemoer (STScI), Alyssa Pagan (STScI). 在这张韦伯近红外相机（NIRCam）拍摄的照片中，新形成的恒星最为抢眼。这些明亮的红色球体通常具有衍射尖峰，位于尘埃柱的外面。当气体和尘埃柱内形成具有足够质量的结节时，它们在自身重力作用下开始坍缩，缓慢升温，最终形成新恒星。那些在尘埃柱边缘看起来像熔岩的波浪线呢？这些是恒星的抛射物，它们仍在气体和尘埃中形成。年轻的恒星会周期性地喷射出超音速喷流，这些喷流会与物质云发生碰撞，比如这些厚厚的尘埃柱。这有时也会导致弓形冲击，这种冲击可以形成波浪状的图案，就像船在水中移动一样。深红色的光芒来自喷流和冲击产生的高能氢分子。这在从顶部看的第二和第三根尘埃柱上很明显——NIRCam图像实际上随着它们的活动而跳动。据估计，这些年轻的恒星只有几十万年的历史。尽管近红外光似乎使韦伯能够“穿透”云层，揭示了尘埃柱之外的巨大宇宙距离，但在这个视图中没有星系。相反，一种半透明气体和尘埃的混合物，即我们银盘最致密部分的星际介质，阻挡了我们对更深宇宙的观察。这一场景于1995年由哈勃首次拍摄，并于2014年重新拍摄这一场景，但许多其他天文台也曾深入观察过这一区域。每台先进的仪器都为研究人员提供了关于这个几乎布满恒星的区域的新细节。这张裁剪紧凑的图像位于6500光年外的巨大的鹰状星云内。观看一段视频，看看韦伯用近红外光拍摄的创生之柱。影像来源：NASA, ESA, CSA, STScI; Joseph DePasquale (STScI), Anton M. Koekemoer (STScI), Alyssa Pagan (STScI); Danielle Kirshenblat (STScI). 从太空望远镜科学研究所下载全分辨率、未压缩版本和支持的韦伯近红外图像的视觉效果、哈勃和韦伯图像的对比，以及观看韦伯拍摄的图像视频。詹姆斯·韦伯太空望远镜是世界上首屈一指的太空科学天文台。韦伯将解开我们太阳系中的谜团，展望其他恒星周围的遥远世界，探索我们宇宙的神秘结构和起源以及我们在其中的位置。韦伯是由NASA及其合作伙伴 ESA和CSA领导的一项国际计划。参考来源： https://www.nasa.gov/feature/goddard/2022/nasa-s-webb-takes-star-filled-portrait-of-pillars-of-creation