Circinus Galaxy Spews Gas into Space : 無料・フリー素材/写真
Circinus Galaxy Spews Gas into Space / NASA Hubble
| ライセンス | クリエイティブ・コモンズ 表示 2.1 |
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| 説明 | Even though it's only 13 million light-years distant and bright enough to be seen by amateur telescopes, the Circinus Galaxy (or ESO 97-G13) went unnoticed until the 1970s because it is located in the plane of our galaxy and hidden among the dust and gas found there. This Hubble image shows the central portion of the galaxy — no more than about one-fifth of its total size. The galaxy is designated a type 2 Seyfert, a class of mostly spiral galaxies that have compact centers and are believed to contain massive black holes. Seyfert galaxies are themselves part of a larger class of objects called active galactic nuclei (or AGN). AGN have the ability to remove gas from the centers of their galaxies by blowing it out into space at phenomenal speeds. Astronomers have seen evidence of a powerful AGN at the center of this galaxy as well.Hot gas, colored pink, is being ejected out of the Circinus Galaxy's central region by the massive black hole thought to reside there. Much of the galaxy’s gas, however, is concentrated in two rings. The outer ring, located about 700 light-years from the center, appears mostly red and is home to tremendous bursts of star formation. A previously unseen inner ring, visible inside the green disk, is only 130 light-years from the center. For more information, visit: hubblesite.org/image/1010/news_release/2000-37Credit: NASA, Andrew S. Wilson (University of Maryland); Patrick L. Shopbell (Caltech); Chris Simpson (Subaru Telescope); Thaisa Storchi-Bergmann and F. K. B. Barbosa (UFRGS, Brazil); and Martin J. Ward (University of Leicester, U.K.)Find us on Twitter, Instagram, Facebook and YouTube |
| 撮影日 | 2018-05-18 11:20:16 |
| 撮影者 | NASA Hubble |
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