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.

  • Galaxies as 'cosmic cauldrons'
    on May 22, 2019 at 7:31 pm

    Star formation within interstellar clouds of gas and dust, so-called molecular clouds, proceeds very rapidly yet highly 'inefficiently'. Most of the gas is dispersed by stellar radiation, revealing galaxies to be highly dynamic systems, like 'cosmic cauldrons', consisting of components that constantly change their appearance. A team of scientists has reached these conclusions based on new observations of the NGC 300 spiral galaxy. […]

  • Galaxy blazes with new stars born from close...
    on May 16, 2019 at 3:46 pm

    The irregular galaxy NGC 4485 shows all the signs of having been involved in a hit-and-run accident with a bypassing galaxy. Rather than destroying the galaxy, the chance encounter is spawning a new generation of stars, and presumably planets. […]

  • Star formation burst in the Milky Way 2-3 billion...
    on May 8, 2019 at 5:45 pm

    Researchers have found, analyzing data from the Gaia satellite, that a strong star formation burst occurred in the Milky Way about 2 to 3 billion years ago. In this process, more than 50 percent of the stars that created the galactic disc may have been born. […]

  • Hubble spots a stunning spiral galaxy
    on May 3, 2019 at 2:08 pm

    NGC 2903 is located about 30 million light-years away in the constellation of Leo (the Lion), and was studied as part of a Hubble survey of the central regions of roughly 145 nearby disk galaxies. […]

  • Milky Way star with strange chemistry is from...
    on April 30, 2019 at 4:17 pm

    Astronomers have discovered a star in the Milky Way Galaxy with a chemical composition unlike any other star in our Galaxy. This chemical composition has been seen in a small number of stars in dwarf galaxies orbiting the Milky Way. This suggests that the star was part of a dwarf galaxy that merged into the Milky Way. […]


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.

  • Ultra-luminous X-ray pulsar NGC 300 ULX1...
    on May 22, 2019 at 1:18 pm

    Using NASA's Swift space telescope and NICER instrument aboard the International Space Station (ISS), astronomers have investigated the properties of an ultra-luminous X-ray pulsar known as NGC 300 ULX1. Results of this study, presented in a paper published May 9 on the arXiv preprint server, indicate that this object experienced an unprecedented spin evolution as its spin period decreased significantly during a timespan of four years. […]

  • Cooking, cleaning and personal hygiene: Why video...
    on May 21, 2019 at 2:00 pm

    Video games are often seen as immersive fantasies, which offer a means of escape from the humdrum chores and duties of everyday life. Games studies scholars speak of players entering a "magic circle", forged by programmers—an act apart", with its own unique rules and rituals. But this way of thinking about games—as simple escapes, stress releases and magic circle worlds—has started to lose its validity. […]

  • All base units of measurement now tied to defined...
    on May 21, 2019 at 12:00 pm

    Scales aren't changing and the weather won't be noticeably different, but on May 20 the definitions that underlie what your scale and thermometer report—along with standard definitions used in chemistry and electronics—are undergoing a major overhaul. That's the date that a more-than-centuries-long process of standardizing measurements reaches its conclusion. […]

  • Advanced civilizations could be communicating...
    on May 20, 2019 at 1:50 pm

    In 1960, famed theoretical physicist Freeman Dyson made a radical proposal. In a paper titled "Search for Artificial Stellar Sources of Infrared Radiation," he suggested that advanced extra-terrestrial intelligences (ETIs) could be found by looking for signs of artificial structures so large that they encompass entire star systems (also known as megastructures). Since then, many scientists have come up with their own ideas for possible megastructures. […]

  • Is dark matter made of axions? Black holes may...
    on May 20, 2019 at 1:19 pm

    What is dark matter made of? It's one of the most perplexing questions of modern astronomy. We know that dark matter is out there, since we can see its obvious gravitational influence on everything from galaxies to the evolution of the entire universe, but we don't know what it is. Our best guess is that it's some sort of weird new particle that doesn't like to talk to normal matter very often (otherwise, we would have seen it by now). One possibility is that it's an exotic hypothetical kind of […]