Arp 93：宇宙级的拥抱

Arp 93：宇宙级的拥抱

ByNASA中文

2023年8月16日 Arp 93: A Cosmic Embrace Image Credit & Copyright: Mike Selby, Observatorio El Sauce Explanation: Locked in a cosmic embrace, two large galaxies are merging at the center of this sharp telescopic field of view. The interacting system cataloged as Arp 93 is some 200 million light-years distant toward the constellation Aquarius in planet Earth’s sky. Individually the galaxies are identified as NGC 7285 (right) and NGC 7284. Their bright cores are still separated by about 20,000 light-years or so, but a massive tidal stream, a result of their ongoing gravitational interaction, extends over 200,000 light-years toward the bottom of the frame. Interacting galaxies do look peculiar, but are now understood to be common in the Universe. In fact, closer to home, the large…

波江座的星系

波江座的星系

ByNASA中文

2023年7月27日 Galaxies in the River Image Credit & License: CTIO/NOIRLab/DOE/NSF/AURA; R. Colombari, M. Zamani & D. de Martin (NSF’s NOIRLab) Explanation: Large galaxies grow by eating small ones. Even our own galaxy engages in a sort of galactic cannibalism, absorbing small galaxies that are too close and are captured by the Milky Way’s gravity. In fact, the practice is common in the universe and illustrated by this striking pair of interacting galaxies from the banks of the southern constellation Eridanus, The River. Located over 50 million light years away, the large, distorted spiral NGC 1532 is seen locked in a gravitational struggle with dwarf galaxy NGC 1531, a struggle the smaller galaxy will eventually lose. Seen nearly edge-on, spiral NGC 1532 spans about 100,000 light-years….

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…