In this image, the magenta color indicates the mysterious glow detected by NASA's NuSTAR space telescope.Excerpt from huffingtonpost.com A mysterious glow has been observed at the center of the Milky Way, and scientists are struggling to figure o...
In this image, the magenta color indicates the mysterious glow detected by NASA's NuSTAR space telescope.Excerpt from huffingtonpost.com A mysterious glow has been observed at the center of the Milky Way, and scientists are struggling to figure o...
This map shows the full extent of the Milky Way galaxy - a spiral galaxy of at least two hundred billion stars. Our Sun is buried deep within the Orion Arm about 26 000 light years from the centre. Towards the centre of the Galaxy the stars are ...
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Artist’s impression of the Milky Way. Its hot halo appears to be stripping away the star-forming atomic hydrogen from its companion dwarf spheroidal galaxies. Image credit: NRAO/AUI/NSF |
"Astronomers wondered if, after billions of years of interaction, the nearby dwarf spheroidal galaxies have all the same star-forming ‘stuff’ that we find in more distant dwarf galaxies."
"What we found is that there is a clear break, a point near our home galaxy where dwarf galaxies are completely devoid of any traces of neutral atomic hydrogen."Bottom line: New observations by large radio telescopes reveal that within a well-defined boundary around our galaxy, dwarf galaxies are completely devoid of star-making hydrogen gas. Astronomers say our Milky Way is to blame.
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Neighboring galaxies to our own Milky Way (Descriptions below) |
NAME | DISTANCE (kpc) | DISCOVERY PAPER |
---|---|---|
Canes Major | 7.2 | Martin et al. 2004, A dwarf galaxy remnant in Canis Major: the fossil of an in-plane accretion on to the Milky Way |
Segue 3 | 17 | Belokurov et al. 2010, Big Fish, Little Fish: Two New Ultra-Faint Satellites of the Milky Way |
Segue 1 | 23 | Belokurov et al. 2007, Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions |
Sagittarius | 24 | Ibata, Gilmore & Irwin, 1994, A dwarf satellite galaxy in Sagittarius 1995, Sagittarius: the nearest dwarf galaxy |
Segue 2 | 34.7 | Belokurov et al. 2009, The discovery of Segue 2: a prototype of the population of satellitesof satellites |
Bootes II | 43 | Walsh, Jerjen & Willman, 2007, A Pair of Bootes: A New Milky Way Satellite |
Coma | 44 | Belokurov et al. 2007, Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions |
Willman 1 (SDSSJ1049+5103) | 45 | Willman et al. 2005, A New Milky Way Companion: Unusual Globular Cluster or Extreme Dwarf Satellite? |
Bootes III | 46 | Grillmair 2009, Four New Stellar Debris Streams in the Galactic Halo |
LMC | 50.8 | - |
SMC | 59.7 | - |
Bootes | 60 | Belokurov et al. 2006, A Faint New Milky Way Satellite in Bootes |
Ursa Minor | 66 | A.G. Wilson of the Lowell Observatory in 1955, Sculptor-Type Systems in the Local Group of Galaxies |
Sculptor (Scl) | 79 | discovered in 1938 by Harlow Shapley, A Stellar System of a New Type |
Draco | 82 | A.G. Wilson of the Lowell Observatory in 1955, Sculptor-Type Systems in the Local Group of Galaxies |
Sextans | 89 | Mike Irwin, M.T. Bridgeland, P.S. Bunclark and R.G. McMahon, 1990 A new satellite galaxy of the Milky Way in the constellation of Sextans |
Ursa Major (UMa) | 100 | Willman et al. 2005, A New Milky Way Dwarf Galaxy in Ursa Major |
Carina | 103 | Cannon, R. D., Hawarden, T. G., & Tritton, S. B., 1977, A new Sculptor-type dwarf elliptical galaxy in Carina |
Hercules | 140 | Belokurov et al. 2007, Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions |
Fornax | 140 | discovered in 1938 by Harlow Shapley, described in "Two Stellar Systems of a New Kind", Nature, Vol. 142, p. 715 |
Canes Venatici II | 150 | Sakamoto & Hasegawa 2006, Discovery of a Faint Old Stellar System at 150 kpc |
Leo IV | 160 | Belokurov et al. 2007, Cats and Dogs, Hair and A Hero: A Quintet of New Milky Way Companions |
Pisces II | 182 | Belokurov et al. 2010, Big Fish, Little Fish: Two New Ultra-Faint Satellites of The Milky Way |
Leo II (Leo B) | 208 | Robert G. Harrington and Albert George Wilson, 1950, Two New Stellar Systems in Leo |
Canes Venatici | 220 | Zucker et al. 2006 A New Milky Way Dwarf Satellite in Canes Venatici |
Leo I | 254 | Robert G. Harrington and Albert George Wilson, 1950, Two New Stellar Systems in Leo |
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The planet orbits one member of a binary star system 25,000 light-years from Earth. |
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