| 词条 | NGC 7049 |
| 释义 |
| name = NGC 7049 | image = NGC 7049aa.jpg | image_size = 250px | caption = NGC 7049 - image from the Hubble Space Telescope's Advanced Camera for Surveys | epoch = J2000 | ra = {{RA|21|19|00.25}}[1] | dec = {{DEC|-48|33|43.24}}[1] | type = S0 | dist_ly = 100 Mly[2] | dist_pc 30.360 Mpc | z = 2285 km/s[1] | appmag_v = 10.7[1] | constellation name = Indus | names = ESO 236-1,[3] PGC 66549[1] |size = ~150,000 ly[2] }} NGC 7049 is a lenticular galaxy[1] that spans about 150,000 light-years and lies about 100 million light-years away from Earth[2] in the inconspicuous southern constellation of Indus. NGC 7049's unusual appearance is largely due to a prominent rope-like dust ring which stands out against the starlight behind it. These dust lanes are usually seen in young galaxies with active star-forming regions. NGC 7049 shows the features of both an elliptical galaxy and a spiral galaxy, and has relatively few globular clusters, indicative of its status as a lenticular type.[4]{{citation needed|date=July 2016}} near the galaxy's center. NGC 7049 is the brightest (BCG) of the Indus triplet of galaxies (NGC 7029, NGC 7041, NGC 7049),[5] and its structure might have arisen from several recent galaxy collisions. Typical BCGs are some of the oldest and most massive galaxies.[6]{{dubious|date=July 2016}} References1. ^1 2 3 4 5 {{cite web | title=NASA/IPAC Extragalactic Database | work=Results for NGC 7049 | url=http://nedwww.ipac.caltech.edu/ | accessdate=2016-11-18}} 2. ^1 2 {{cite news | title=Unusual Dusty Galaxy NGC 7049 | url=http://apod.nasa.gov/apod/ap090408.html | accessdate = 18 November 2016 }} 3. ^{{cite web | title=SIMBAD Astronomical Database | work=Results for NGC 7049 | url=http://simbad.u-strasbg.fr/Simbad/ | accessdate=2016-11-16}} 4. ^[https://web.archive.org/web/20090413143730/http://www.astroleague.org/node/442 The Astronomical League] 5. ^{{Cite news|url=http://annesastronomynews.com/photo-gallery-ii/galaxies-clusters/ngc-7049/|title=NGC 7049, an unusual galaxy in Indus|date=2012-08-05|work=Anne's Astronomy News|access-date=2017-06-09|language=nl-NL}} 6. ^{{Cite APOD |date=8 April 2009 |title=Unusual Dusty Galaxy NGC 7049 |access-date=}} External links{{commonscat-inline|NGC 7049}}
3 : NGC objects|Indus (constellation)|Lenticular galaxies |
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