2021年02月24日 Spiral Galaxy M66 from Hubble Image Credit: NASA, ESA, Hubble, Janice Lee; Processing & Copyright: Leo Shatz; Text: Karen Masters Explanation: It’s always nice to get a new view of an old friend. This stunning Hubble Space Telescope image of nearby spiral galaxy M66 is just that. A […]
2021年01月26日 Central NGC 1316: After Galaxies Collide Image Credit: NASA, ESA, Hubble; Processing & Copyright: Daniel Nobre Explanation: How did this strange-looking galaxy form? Astronomers turn detectives when trying to figure out the cause of unusual jumbles of stars, gas, and dust like NGC 1
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 constellati
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
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 g
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 barre
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
