Definitions for GALAXIES
gal·ax·ies

WiktionaryRate this definition:5.0 / 1 vote

1. galaxiesnoun

   Plural form of galaxy.

WikipediaRate this definition:0.0 / 0 votes

1. galaxies

   A galaxy is a system of stars, stellar remnants, interstellar gas, dust, dark matter, bound together by gravity. The word is derived from the Greek galaxias (γαλαξίας), literally 'milky', a reference to the Milky Way galaxy that contains the Solar System. Galaxies, averaging an estimated 100 million stars, range in size from dwarfs with less than a hundred million stars, to the largest galaxies known – supergiants with one hundred trillion stars, each orbiting its galaxy's center of mass. Most of the mass in a typical galaxy is in the form of dark matter, with only a few percent of that mass visible in the form of stars and nebulae. Supermassive black holes are a common feature at the centres of galaxies. Galaxies are categorized according to their visual morphology as elliptical, spiral, or irregular. Many are thought to have supermassive black holes at their centers. The Milky Way's central black hole, known as Sagittarius A*, has a mass four million times greater than the Sun. As of March 2016, GN-z11 is the oldest and most distant galaxy observed. It has a comoving distance of 32 billion light-years from Earth, and is seen as it existed just 400 million years after the Big Bang. In 2016, using 20 years of images from the Hubble space telescope, it was estimated that there were in total two trillion (2×1012) or more galaxies in the observable universe, and as many as an estimated 1×1024 stars (more stars than all the grains of sand on all beaches of the planet Earth).In 2021, data from NASA's New Horizons space probe was used to revise the earlier estimate to roughly 200 billion galaxies (2×1011),Most galaxies are 1,000 to 100,000 parsecs in diameter (approximately 3,000 to 300,000 light years) and are separated by distances on the order of millions of parsecs (or megaparsecs). For comparison, the Milky Way has a diameter of at least 26,800 parsecs (87,400 ly) and is separated from the Andromeda Galaxy (with diameter of about 152,000 ly), its nearest large neighbor, by 780,000 parsecs (2.5 million ly.) The space between galaxies is filled with a tenuous gas (the intergalactic medium) with an average density of less than one atom per cubic meter. Most galaxies are gravitationally organized into groups, clusters and superclusters. The Milky Way is part of the Local Group, which it dominates along with Andromeda Galaxy. The group is part of the Virgo Supercluster. At the largest scale, these associations are generally arranged into sheets and filaments surrounded by immense voids. Both the Local Group and the Virgo Supercluster are contained in a much larger cosmic structure named Laniakea.

Webster DictionaryRate this definition:0.0 / 0 votes

1. Galaxies

   of Galaxy

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Galaxies

   Large aggregates of CELESTIAL STARS; COSMIC DUST; and gas. (From McGraw Hill Dictionary of Scientific and Technical Terms, 6th ed)

How to pronounce GALAXIES?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

   Natasha

   Australian

   Veena

   Indian

   Priya

   Indian

   Neerja

   Indian

   Zira

   US English

   Oliver

   British

   Wendy

   British

   Fred

   US English

   Tessa

   South African

How to say GALAXIES in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of GALAXIES in Chaldean Numerology is: 4

2. Pythagorean Numerology

   The numerical value of GALAXIES in Pythagorean Numerology is: 6

Examples of GALAXIES in a Sentence

1. George Rieke:

   However, logic dictates that at some point during the first few hundred million years, these familiar-looking objects must have come from somewhere and evolved, after all, galaxies don't spring up from nothing, virtually overnight.

2. Jonathan Davis:

   These telescopes were designed to look for diffuse light around galaxies. Not in the context of dark matter, but you can repurpose the data to look for this glow, [The Dragonfly telescopes] are really good at looking for this high contrast between the really bright galactic center and the really dim outskirts of galaxies.

3. Imran Sultan:

   The juxtaposition of our friendly visitor and galaxies hundreds of millions of light-years away really conveys how enormous our universe is, this comet started its journey in the most distant parts of our Solar System and may even leave the Solar System entirely after this visit, so capturing this historic event has been extraordinary.

4. Joel Leja:

   This is our first glimpse back this far, so it’s important that we keep an open mind about what we are seeing, while the data indicates they are likely galaxies, I think there is a real possibility that a few of these objects turn out to be obscured supermassive black holes. Regardless, the amount of mass we discovered means that the known mass in stars at this period of our universe is up to 100 times greater than we had previously thought. Even if we cut the sample in half, this is still an astounding change.

5. Ray Norris:

   No doubt the SKA telescopes, once built, will find many more ORCs and be able to tell us more about the lifecycle of galaxies, until the SKA becomes operational, ASKAP and MeerKAT are set to revolutionise our understanding of the Universe faster than ever before.

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References

1. ^ Wiktionary
   https://en.wiktionary.org/wiki/Galaxies
2. ^ Wikipedia
   https://en.wikipedia.org/wiki/Galaxies
3. ^ Webster Dictionary
   https://www.merriam-webster.com/dictionary/GALAXIES