潘朵拉星系团

潘朵拉星系团

ByNASA中文

2023年6月9日 Pandora’s Cluster of Galaxies Image Credit: NASA, ESA, CSA, Ivo Labbe (Swinburne), Rachel Bezanson (University of Pittsburgh), Processing: Alyssa Pagan (STScI) Explanation: This deep field mosaicked image presents a stunning view of galaxy cluster Abell 2744 from the James Webb Space Telescope’s NIRCam. Also dubbed Pandora’s Cluster, Abell 2744 itself appears to be a ponderous merger of three different massive galaxy clusters some 3.5 billion light-years away toward the constellation Sculptor. Dominated by dark matter, the mega-cluster warps and distorts the fabric of spacetime, gravitationally lensing even more distant objects. Redder than the Pandora cluster galaxies many of the lensed sources are very distant galaxies in the early Universe, stretched and distorted into arcs. Of course distinctive diffraction spikes mark foreground Milky Way stars….

韦伯图像: 棒旋星系NGC 1365

韦伯图像: 棒旋星系NGC 1365

ByNASA中文

2023年2月18日 Barred Spiral Galaxy NGC 1365 from Webb Image Credit: NASA, ESA, CSA, Janice Lee (NOIRLab) – Processing: Alyssa Pagan (STScI) Explanation: A mere 56 million light-years distant toward the southern constellation Fornax, NGC 1365 is an enormous barred spiral galaxy about 200,000 light-years in diameter. That’s twice the size of our own barred spiral Milky Way. This sharp image from the James Webb Space Telescope’s Mid-Infrared Instrument (MIRI) reveals stunning details of this magnificent spiral in infrared light. Webb’s field of view stretches about 60,000 light-years across NGC 1365, exploring the galaxy’s core and bright newborn star clusters. The intricate network of dusty filaments and bubbles is created by young stars along spiral arms winding from the galaxy’s central bar. Astronomers suspect the gravity…

韦伯用高精度技术探测查里克洛环系统

韦伯用高精度技术探测查里克洛环系统

ByNASA中文

在一项高精度的观测壮举中，科学家们利用NASA詹姆斯·韦伯太空望远镜的一项新技术，拍摄到了查里克洛薄环所投射的星光阴影。查里克洛是一个冰冷的小天体，但却是已知的半人马小行星中最大的一个，位于土星轨道外20亿英里之外。查里克洛的直径仅为160英里（250公里），比地球的直径小51倍，其环距天体中心约250英里（400公里）。

LHS 475 b: 地球尺寸的系外行星

LHS 475 b: 地球尺寸的系外行星

ByNASA中文

2023年1月24日 LHS 475 b: Earth-Sized Exoplanet Illustration Credit: DeepAI’s Fantasy World Generator Explanation: If you could stand on exoplanet LHS 475 b, what might you see? No one knows for sure but pictured here is an interesting guess made by an Earth-based artificial intelligence (AI) engine. The existence of the exoplanet was indicated in data taken by the Earth-orbiting TESS satellite but confirmed and further investigated only this year by the near-Earth Sun-orbiting James Webb Space Telescope. What is known for sure is that LHS 475 b has a mass very similar to our Earth and closely orbits a small red star about 40 light years away. The featured AI-illustrated guess depicts a plausibly rugged Earth-like landscape replete with molten lava and with the central…

韦伯：M16的恒星形成之柱

韦伯：M16的恒星形成之柱

ByNASA中文

2022年12月6日 M16: A Star Forming Pillar from Webb Image Credit: NASA, ESA, CSA, STScI, Processing & Copyright: Mehmet Hakan Özsaraç Explanation: What’s happening inside this interstellar mountain? Stars are forming. The mountain is actually a column of gas and dust in the picturesque Eagle Nebula (M16). A pillar like this is so low in density that you could easily fly though it — it only appears solid because of its high dust content and great depth. The glowing areas are lit internally by newly formed stars. These areas shine in red and infrared light because blue light is scattered away by intervening interstellar dust. The featured image was captured recently in near-infrared light in unprecedented detail by the James Webb Space Telescope (JWST), launched late…

IIZw096: 合并中的星系对

IIZw096: 合并中的星系对

ByNASA中文

2022年12月2日 Merging Galaxy Pair IIZw096 Image Credit: ESA/Webb, NASA & CSA, L. Armus, A. Evans Explanation: Bright at infrared wavelengths, this merging galaxy pair is some 500 million light-years away toward the constellation Delphinus. The cosmic mashup is seen against a background of even more distant galaxies, and occasional spiky foreground stars. But the galaxy merger itself spans about 100,000 light-years in this deep James Webb Space Telescope image. The image data is from Webb’s Near-InfraRed Camera (NIRCam) and Mid-InfraRed Instrument (MIRI). Their combined, sharp infrared view follows galactic scale restructuring in the dusty merger’s wild jumble of intense star forming regions and distorted spiral arms Tomorrow’s picture: Stereo Saturday IIZw096: 合并中的星系对 图像提供: ESA/Webb, NASA & CSA, L. Armus, A. Evans 说明: 这对在海豚座方向约5亿光年远处的合并中星系，是红外光波段很明亮的天体。这个“宇宙混搭”景观，以更遥远的背景星系为衬托，偶而也有带芒的前景恒星来凑热闹。这幅韦伯太空望远镜深空图像所呈现的合并星系对，其跨幅约为100,000光年。组成这幅图像的数据来自韦伯的近红外相机（NIRCam）及中红外成像分光仪（MIRI）。这幅韦伯的整合红外光图像，清晰的呈现这个尘土飞扬的星系级重组事件，及其所造就的狂暴恒星形成区及扭曲螺旋臂。 明日的图片: Stereo…

创生之柱

创生之柱

ByNASA中文

2022年10月20日 Pillars of Creation Image Credit: Science – NASA, ESA, CSA, STScI, NIRCam Processing – Joseph DePasquale (STScI), Anton M. Koekemoer (STScI), Alyssa Pagan (STScI) Explanation: A now famous picture from the Hubble Space Telescope featured these star forming columns of cold gas and dust light-years long inside M16, the Eagle Nebula, dubbed the Pillars of Creation. This James Webb Space Telescope NIRCam image expands Hubble’s exploration of that region in greater detail and depth inside the iconic stellar nursery. Particularly stunning in Webb’s near infrared view is the telltale reddish emission from knots of material undergoing gravitational collapse to form stars within the natal clouds. The Eagle Nebula is some 6,500 light-years distant. The larger bright emission nebula is itself an easy target for…

螺旋星系M74：更清晰的影像

螺旋星系M74：更清晰的影像

ByNASA中文

2022年7月22日 Spiral Galaxy M74: A Sharper View Image Credit: NASA, ESA, CSA, STScI; Processing Copyright: Robert Eder Explanation: Beautiful spiral galaxy Messier 74 (also known as NGC 628) lies some 32 million light-years away toward the constellation Pisces. An island universe of about 100 billion stars with two prominent spiral arms, M74 has long been admired by astronomers as a perfect example of a grand-design spiral galaxy. M74’s central region is brought into a stunning, sharp focus in this recently processed image using publicly available data from the James Webb Space Telescope. The colorized combination of image data sets is from two of Webb’s instruments NIRcam and MIRI, operating at near- and mid-infrared wavelengths. It reveals cooler stars and dusty structures in the grand-design spiral…