Galaxy

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Star survey produces stunningly detailed image of Milky Way (Thomas H. Maugh II, LA Times)
Zoomable Image (European Southern Observatory)

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Physical Universe (Mass, Force)
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General

Dictionary

galaxy : any of the very large groups of stars and associated matter that are found throughout the universe — Webster

Oxford, OneLook, Free Dictionary, Wiktionary, InfoPlease, Word Reference, Urban Dictionary

Thesaurus

Roget’s II (Thesaurus.com), Merriam-Webster Thesaurus, Visuwords

Encyclopedia

Galaxy is a massive, gravitationally bound system that consists of stars and stellar remnants, an interstellar medium of gas and dust, and an important but poorly understood component tentatively dubbed dark matter. Galaxies contain varying amounts of star systems, star clusters and types of interstellar clouds. In between these objects is a sparse interstellar medium of gas, dust, and cosmic rays. Dark matter appears to account for around 90% of the mass of most galaxies. — Wikipedia

David Darling’s Internet Encyclopedia of Science, Britannica, Columbia (Infoplease)

Introduction

Galaxy Introduction (Astronomy Online)

Directory

DMOZ Open Directory Project (AOL)

Search

WolframAlpha, DuckDuckGo

Preservation

History

Historical Overview of the Discovery of Galaxies (Earth Guide)
Timeline of knowledge about galaxies, clusters of galaxies… (Wikipedia)

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Quotations Page Bartlett’s

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Stars & Galaxies (NASA JPL)

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USA.gov

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Galaxies News -- ScienceDaily News and research on the formation of galaxies. From the Milky Way to Andromeda Galaxy, see astronomy images of splendid galaxies in the universe. Read the latest research discoveries.

  • Dawn of a galactic collision
    on December 14, 2017 at 7:07 pm

    A riot of color and light dances through this peculiarly shaped galaxy, NGC 5256. Its smoke-like plumes are flung out in all directions and the bright core illuminates the chaotic regions of gas and dust swirling through the galaxy's center. Its odd structure is due to the fact that this is not one galaxy, but two -- in the process of a galactic collision. […]

  • Hubble's celestial snow globe
    on December 12, 2017 at 7:19 pm

    It's beginning to look a lot like the holiday season in this Hubble Space Telescope image of a blizzard of stars, which resembles a swirling snowstorm in a snow globe. The stars are residents of the globular star cluster Messier 79 (also known as M79 or NGC 1904), located 41,000 light-years from Earth, in the constellation Lepus. […]

  • Telescopes team up to study giant galaxy
    on December 12, 2017 at 2:10 pm

    Astronomers have used two Australian radio telescopes and several optical telescopes to study complex mechanisms that are fuelling jets of material blasting away from a black hole 55 million times more massive than the Sun. […]

  • Galaxy orbits in the local supercluster
    on December 8, 2017 at 2:55 pm

    Astronomers have produced the most detailed map ever of the orbits of galaxies in our extended local neighborhood, showing the past motions of almost 1,400 galaxies within 100 million light years of the Milky Way. The team reconstructed the galaxies' motions from 13 billion years in the past to the present day. […]

  • Galaxy growth in a massive halo in the first...
    on December 7, 2017 at 7:07 pm

    Observations of two galaxies made with the National Science Foundation-funded Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope suggest that large galaxies formed faster than scientists had previously thought. […]