Excerpt from theweek.com NASA's Kepler finds massive alien planet 180 light years away NASA's Kepler space telescope has discovered its first alien planet since malfunctioning in May 2013,...
Tag: pisces (page 1 of 3)
 |
| 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 |
Excerpt from
earthsky.org
Astronomers have discovered that our nearest galactic neighbors are devoid of star-forming gas, and that our Milky Way is to blame.
New observations by large radio telescopes reveal that within a well-defined boundary around our galaxy, dwarf galaxies are completely devoid of hydrogen gas. Beyond this point, dwarf galaxies are teeming with star-forming material.
The Milky Way galaxy is actually the largest member of a compact clutch of galaxies that are bound together by gravity. Swarming around our home galaxy is a menagerie of smaller dwarf galaxies, the smallest of which are the relatively nearby dwarf spheroidals, which may be the leftover building blocks of galaxy formation.
Further out are a number of similarly sized and slightly misshaped dwarf irregular galaxies, which are not gravitationally bound to the Milky Way and may be relative newcomers to our galactic neighborhood.
Kristine Spekkens is an assistant professor at the Royal Military College of Canada and lead author on a paper published in the Astrophysical Journal Letters. She said:
"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."
Spekkens said:
"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.
 |
| 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 |
cafeastrology.comA NEW Moon occurs on Wednesday, September 24, 2014, at 2:14 AM EDT. Early Wednesday, a new cycle begins. The Virgo New Moon cycle ends and the Libra New Moon cycle begins. The New Moon in Libra cycle is a good time to commit ...
Time is actually speeding up (or collapsing). For thousands of years the Schumann Resonance or pulse (heartbeat) of Earth has been 7.83 cycles per second, The military have used this as a very reliable reference. However, since 1980 this resonance has been slowly rising. Some scientists believe that it is rising faster than we can measure seeing as it is constantly rising while measuring.This is from a member of the Physics Forum:"The universe is expanding; interstellar distances [...]
{mainvote}
Aries weekly astrology 16th April 2012 with Michele Knight
Taurus weekly astrology 16th April 2012 with Michele Knight
Gemini weekly astrology 16th April 2012 with Michele Knight
Cancer weekly astrology 16th April 2012 ...
… Mercury behind the Sun requires we have faith and trust in the unseen forces … This week, April 1st through April 7th, begins with Mercury continuing to move retrograde in motion through the spirit-focused sign of Pisces. Events are ha...
{mainvote}
Aries APRIL 2012 monthly astrology with Michele Knight
Taurus APRIL 2012 monthly astrology with Michele Knight
Gemini APRIL 2012 monthly astrology with Michele Knight
Cancer APRIL 2012 monthly astrology with Michele Kni...
This week, February 26th through March 3rd, begins with Mercury moving toward its retrograde station. Mercury comes into 23 Pisces which will ultimately begin the gathering point of information that will start the cosmic correction process. Related pos...
This week, February 19th through February 25th, begins with Sun shifting into Pisces at the midnight hours between Saturday and Sunday. Sun highlights the new Neptune era moving into Pisces. As Sun heralds in the new era a new energy, backdrop and spir...
{mainvote}
21 February 2012
Channeler: Lena Stevens
Dear Friends,
The New Moon is Tuesday, February 21 at 3:35 PM Mountain Standard Time. This new moon is a time to recharge. You will feel like resting, getting more sleep, taking all...
{mainvote}
a message from Kate Spreckley
Monday, 6 February, 2012 (posted 13 February, 2012)
As we continue upon our path of evolutionary growth and development, the shifts and changes we experience can be viewed through the m...
{mainvote}
7 February 2012
Channeler: Lena Stevens
Dear Friends,
The Full Moon is Tuesday, February 7 at 2:57 PM Mountain Standard Time. If anything is really stuck in your life right now it will show up in its full glory. Use the in...
{mainvote}
Djwhal Khul Spirituality Article Channeled by Rev. Terri Newlon (Complimentary every week)
January 12, 2012
(Channeling begins)
Djwhal Khul here. Tashi Delek.
This is a very important milestone in terms of the...
This work is licensed under a Creative Commons Attribution 4.0
International License.
unless otherwise marked.
Terms of Use | Privacy Policy
— Up ↑ —
Comments