保护地球，探索宇宙，发现文明
斯蒂芬五重奏（Stephan ‘s Quintet）是由五个星系组成的视觉组合，以其在假日经典电影《Stephan ‘s Quintet》中的突出表现而闻名，NASA的詹姆斯·韦伯太空望远镜以全新的视角揭示了斯蒂芬五重奏。这幅巨大的拼图是韦伯迄今为止拍摄的最大图像，覆盖了月球直径的五分之一。它包含超过1.5亿像素，由近1,000个独立的图像文件构成。来自韦伯的信息为星系相互作用如何推动早期宇宙中的星系演化提供了新的见解。 凭借其强大的红外视觉和极高的空间分辨率，韦伯展现了这个星系群中前所未有的细节。由数百万颗年轻恒星组成的闪闪发光的星团和新恒星诞生的星暴区为这幅图像增光添彩。由于引力相互作用，气体、尘埃和恒星的扫尾正从几个星系中被拉出。最引人注目的是，韦伯捕捉到了其中一个星系NGC 73...
NASA的詹姆斯·韦伯太空望远镜拍摄了迄今为止最深处、最清晰的遥远宇宙红外图像。这张被称为韦伯第一深场的星系团SMACS0723的图像充满了细节。 数千个星系——包括在红外线中观测到的最微弱的物体——首次出现在韦伯的视野中。这片广阔的宇宙覆盖了一片天空，它的大小和地面上某个人在一臂距离外捧着的一粒沙子差不多。 韦伯的近红外相机（NIRCam）拍摄的这个深场是由不同波长的图像合成而成的，总共耗时12.5小时——在红外波长上达到的深度超过了哈勃太空望远镜需要花费数周时间才能到达最深处的视野。 这张照片显示的是46亿年前出现的星系团SMACS 0723。这个星系团的总质量就像一个引力透镜，放大了它后面远得多的星系。韦伯的NIRCam让这些遥远的星系清晰地聚焦在一起——它们有以前从未见过的微小而模糊的结构，包括星团和漫...
This NASA/ESA Hubble Space Telescope observation has captured the galaxy CGCG 396-2, an unusual multi-armed galaxy merger which lies around 520 million light-years from Earth in the constellation Orion. This observation is a gem from the Galaxy Zoo project, a citizen science project involving hundreds of thousands of volunteers from around the world who clas...
The Hubble Space Telescope captured this glittering scene using its Wide Field Camera 3 and Advanced Camera for Surveys. Globular clusters are stable, tightly bound groups of tens of thousands to millions of stars. As this image demonstrates, the hearts of globular clusters are densely packed with stars. Terzan 9 is dotted with so many glittering stars that ...
The brilliant cascade of stars through the middle of this image is the galaxy ESO 318-13 as seen by the Hubble Space Telescope in this image from 2012. Despite being located millions of light-years from Earth, the stars captured in this image are so bright and clear one could almost attempt to count them. ESO 318-13 is sandwiched between a vast collection of...
2022年6月15日 In the Heart of the Virgo Cluster Image Credit & Copyright: Saulius Adomaitis Explanation: The Virgo Cluster of Galaxies is the closest cluster of galaxies to our Milky Way Galaxy. The Virgo Cluster is so close that it spans more than 5 degrees on the sky – about 10 times the angle made by a full Moon. With its heart lying about 70 mill...
This new image from NASA’s Hubble Space Telescope looks at two spiral galaxies, collectively known as Arp 303. The pair, individually called IC 563 (bottom right) and IC 564 (top left), are 275 million light-years away in the direction of the constellation Sextans. The image holds data from two separate Hubble observations of Arp 303. The first used Hubble’s...
NASA的哈勃太空望远镜完成了近30年的马拉松比赛，校准了40多个时空“里程碑”，以帮助科学家精确测量宇宙的膨胀率——这是一项曲折的探索。 这组来自NASA哈勃太空望远镜的 36 幅图像展示了这些特征星系，它们都是造父变星和超新星的宿主。 这两种天体现象都是天文学家用来确定天文距离的重要工具，并已被用于改进我们对哈勃常数（宇宙膨胀率）的测量。 这张照片中显示的星系（从顶行，左行到底行，右行）是：NGC 7541，NGC 3021，NGC 5643，NGC 3254，NGC 3147，NGC 105，NGC 2608，NGC 3583，NGC 3147，Mrk 1337，NGC 5861，NGC 2525，NGC 1015，UGC 9391，NGC 691，NGC 7678，NGC 2442，NGC 5468，N...
This new NASA Hubble Space Telescope image captures the central region of the gigantic elliptical galaxy NGC 474. Located some 100 million light-years from Earth, NGC 474 spans about 250,000 light-years across – that’s 2.5 times larger than our own Milky Way galaxy! Along with its enormous size, NGC 474 has a series of complex layered shells that surround it...
This new NASA Hubble Space Telescope image spotlights the giant elliptical galaxy, UGC 10143, at the heart of galaxy cluster, Abell 2147, about 486 million light-years away in the head of the serpent, the constellation Serpens. UGC 10143 is the biggest and brightest member of Abell 2147, which itself may be part of the much larger Hercules Supercluster of ga...