Galaxy

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Physical Realm
Universe Astronomical Instrument
Galaxy Milky Way, Andromeda
Planetary System Star, Brown Dwarf, Planet, Moon

Solar System Sun
Terrestrial Planet Mercury, Venus, Earth (Moon), Mars
Asteroid Belt Ceres, Vesta
Jovian Planet Jupiter, Saturn, Uranus, Neptune
Trans-Neptunian Object
Kuiper Belt Pluto, Haumea, Makemake
Scattered Disc Eris, Sedna, Planet X
Oort Cloud Etc. Scholz’s Star
Small Body Comet, Centaur, Asteroid

Resources

These are organized by a classification scheme developed exclusively for Cosma. More…

General

Dictionary

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

OneLook, Free Dictionary, Wiktionary, 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

Galactic Astronomy (Eric Weisstein’s World of Astronomy, Wolfram Research)
David Darling’s Internet Encyclopedia of Science

Introduction


Galaxy Introduction (Astronomy Online)

Search

Galaxies (Wolfram Alpha)

Preservation

History

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

Quotation

Quotations Page

Library

WorldCat, Library of Congress, UPenn Online Books, Open Library

Participation

Education

What is a Galaxy? (Space Place, NASA)
Galaxies (Ask an Astronomer, Cornell University)
Galaxies (Cosmos4Kids)

Course





Crash Course Astronomy (YouTube)

OER Commons: Open Educational Resources

Community

News

Science Daily, Phys.org, NPR Archives

Book

ISBNdb

Government

Stars & Galaxies (NASA JPL)

Document

USA.gov

Poem

OEDILF: The Omnificent English Dictionary In Limerick Form

Music

Song Lyrics

returntotop

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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.

  • Matter falling into a black hole at 30 percent of...
    on September 20, 2018 at 3:55 pm

    Astronomers report the first detection of matter falling into a black hole at 30% of the speed of light, located in the center of the billion-light year distant galaxy PG211+143. The team used data from the European Space Agency's X-ray observatory XMM-Newton to observe the black hole. […]

  • Gaia hints at our Galaxy’s turbulent life
    on September 19, 2018 at 5:30 pm

    Our Milky Way galaxy is still enduring the effects of a near collision that set millions of stars moving like ripples on a pond, the Gaia star mapping mission has shown. […]

  • Looking back in time to watch for a different...
    on September 19, 2018 at 2:10 pm

    A simulation has suggested what astronomers should look for if they search the skies for a direct collapse black hole in its early stages. […]

  • Magellanic Clouds duo may have been a trio
    on September 18, 2018 at 1:08 pm

    Two of the closest galaxies to the Milky Way -- the Large and Small Magellanic Clouds -- may have had a third companion, astronomers believe. New research describes how another 'luminous' galaxy was likely engulfed by the Large Magellanic Cloud some three to five billion years ago. […]

  • BUFFALO charges towards the earliest galaxies
    on September 13, 2018 at 3:39 pm

    The NASA/ESA Hubble Space Telescope has started a new mission to shed light on the evolution of the earliest galaxies in the Universe. The BUFFALO survey will observe six massive galaxy clusters and their surroundings. The first observations show the galaxy cluster Abell 370 and a host of magnified, gravitationally lensed galaxies around it. […]


Phys.org - latest science and technology news stories Phys.org internet news portal provides the latest news on science including: Physics, Nanotechnology, Life Sciences, Space Science, Earth Science, Environment, Health and Medicine.

  • Image: Hubble's galaxies with knots, bursts
    on September 24, 2018 at 1:30 pm

    In the northern constellation of Coma Berenices (Berenice's Hair) lies the impressive Coma Cluster— a structure of over a thousand galaxies bound together by gravity. Many of these galaxies are elliptical types, as is the brighter of the two galaxies dominating this image: NGC 4860 (center). However, the outskirts of the cluster also host younger spiral galaxies that proudly display their swirling arms. Again, this image shows a wonderful example of such a galaxy in the shape of […]

  • Image: Herschel's view of the galactic centre
    on September 24, 2018 at 1:20 pm

    An odd-shaped formation of gas and dust at the centre of the Milky Way, captured by the far-infrared cameras on board ESA's Herschel space observatory. The nearly continuous strip of dense and cold clumps of material forms an infinity symbol, or sideways 8, that is a few hundred light years across. In this image, the strip twists around an invisible axis running roughly from the top left to the bottom right. […]

  • Researchers study a neutral hydrogen supershell...
    on September 24, 2018 at 1:10 pm

    A duo of researchers from the Czech Republic has performed a study of the neutral hydrogen supershell known as GS242-03+37, a large structure in the Milky Way galaxy. The research, presented in a paper published September 11 on arXiv.org, provides insights into the nature of this supershell and into its interactions with surroundings. […]

  • Narrowing down the mass of the Milky Way
    on September 21, 2018 at 1:20 pm

    Since the birth of modern astronomy, scientists have sought to determine the full extent of the Milky Way galaxy and learn more about its structure, formation and evolution. At present, astronomers estimate that it is 100,000 to 180,000 light-years in diameter and consists of 100 to 400 billion stars – though some estimates say there could be as many as 1 trillion. […]

  • First detection of matter falling into a black...
    on September 20, 2018 at 2:32 pm

    A UK team of astronomers report the first detection of matter falling into a black hole at 30 percent of the speed of light, located in the centre of the billion-light year distant galaxy PG1211+143. The team, led by Professor Ken Pounds of the University of Leicester, used data from the European Space Agency's X-ray observatory XMM-Newton to observe the black hole. Their results appear in a new paper in Monthly Notices of the Royal Astronomical Society. […]