邻近的大质量螺旋星系NGC 2841

邻近的大质量螺旋星系NGC 2841

ByNASA中文

2021年01月24日 Massive Nearby Spiral Galaxy NGC 2841 Image Credit: NASA, ESA, Hubble, Subaru; Composition & Copyright: Roberto Colombari Explanation: It is one of the more massive galaxies known. A mere 46 million light-years distant, spiral galaxy NGC 2841 can be found in the northern constellation of Ursa Major. This sharp view of the gorgeous island universe shows off a striking yellow nucleus and galactic disk. Dust lanes, small, pink star-forming regions, and young blue star clusters are embedded in the patchy, tightly wound spiral arms. In contrast, many other spirals exhibit grand, sweeping arms with large star-forming regions. NGC 2841 has a diameter of over 150,000 light-years, even larger than our own Milky Way. The featured composite image merges exposures from the orbiting 2.4-meter Hubble…

NGC 2174的云山

NGC 2174的云山

ByNASA中文

2021年01月16日 The Mountains of NGC 2174 Image Credit: NASA, ESA, Hubble Heritage Team (STScI/AURA) Explanation: This fantastic skyscape lies near the edge of NGC 2174 a star forming region about 6,400 light-years away in the nebula-rich constellation of Orion. It follows mountainous clouds of gas and dust carved by winds and radiation from the region’s newborn stars, now found scattered in open star clusters embedded around the center of NGC 2174, off the top of the frame. Though star formation continues within these dusty cosmic clouds they will likely be dispersed by the energetic newborn stars within a few million years. Recorded at infrared wavelengths by the Hubble Space Telescope in 2014, the interstellar scene spans about 6 light-years. Scheduled for launch in 2021, the…

侧视星系NGC 5866

侧视星系NGC 5866

ByNASA中文

2020年11月15日 Edge-On Galaxy NGC 5866 Image Credit: NASA, ESA, and The Hubble Heritage Team (STScI/AURA); Acknowledgment: W. Keel (U. Alabama) Explanation: Why is this galaxy so thin? Many disk galaxies are just as thin as NGC 5866, pictured here, but are not seen edge-on from our vantage point. One galaxy that is situated edge-on is our own Milky Way Galaxy. Classified as a lenticular galaxy, NGC 5866 has numerous and complex dust lanes appearing dark and red, while many of the bright stars in the disk give it a more blue underlying hue. The blue disk of young stars can be seen extending past the dust in the extremely thin galactic plane, while the bulge in the disk center appears tinged more orange from the…

NGC 1672:哈勃望远镜拍摄的棒旋星系

NGC 1672:哈勃望远镜拍摄的棒旋星系

ByNASA中文

2020 April 6 NGC 1672: Barred Spiral Galaxy from Hubble Image Credit: Hubble Legacy Archive, NASA, ESA; Processing & Copyright: Daniel Nobre Explanation: Many spiral galaxies have bars across their centers. Even our own Milky Way Galaxy is thought to have a modest central bar. Prominently barred spiral galaxy NGC 1672, featured here, was captured in spectacular detail in an image taken by the orbiting Hubble Space Telescope. Visible are dark filamentary dust lanes, young clusters of bright blue stars, red emission nebulas of glowing hydrogen gas, a long bright bar of stars across the center, and a bright active nucleus that likely houses a supermassive black hole. Light takes about 60 million years to reach us from NGC 1672, which spans about 75,000 light…

哈勃望远镜拍摄到一个星系逆势而动

哈勃望远镜拍摄到一个星系逆势而动

ByNASA中文

这个发光的天体是星系NGC 4621，更广为人知的名字是Messier 59。正如后一个名字所示，这个星系被列在18世纪法国彗星猎人查尔斯·梅西耶编撰的著名的深空天体目录中。然而，德国天文学家约翰·戈特弗里德·克勒(Johann Gottfried Koehler)在梅西耶(Messier)于1779年将这颗星系加入他的收藏前几天发现了这颗星系。 现代观测表明，Messier 59是一个椭圆星系，是与螺旋星系和不规则星系并列的三大类星系之一。椭圆星系往往是这三个星系中进化得最快的，充满了古老的红色恒星，几乎没有或几乎没有新恒星的形成。然而，Messier 59在某种程度上与这一趋势背道而驰;该星系确实显示出恒星形成的迹象，一些新生恒星位于靠近核心的圆盘内。 Messier 59位于室女座(处女座)内2000多个室女座星系团中，距离我们大约5000万光年。这张照片是由美国宇航局/欧洲航天局哈勃太空望远镜的高级巡天照相机拍摄的。 Messier 59出现在哈勃的Messier目录中，其中包括一些可以从地球北半球观测到的最迷人的天体。在以下网址查看更多NASA处理的图像和其他Messier天体：https://www.nasa.gov/content/goddard/hubble-s-messier-catalog 文字来源：ESA (欧洲航天局) 图像来源：Image credit: ESA/Hubble & NASA, P. Cote This luminous orb is the galaxy NGC 4621, better known as Messier 59. As this latter moniker indicates, the galaxy is listed in the famous catalog of deep-sky objects compiled by French comet-hunter Charles Messier in the 18th century. However, German astronomer Johann Gottfried Koehler is credited with discovering the galaxy just days before Messier added it to his collection in 1779. Modern observations show that Messier 59 is an elliptical galaxy, one of the three main kinds of galaxies along with spirals and irregulars. Ellipticals tend to be the most evolved of the trio, full of old, red stars and exhibiting little or…