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

More…

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.

  • Earth's heavy metals result of supernova...
    on June 13, 2019 at 4:10 pm

    New research suggests most of Earth's heavy metals were spewed from a largely overlooked kind of star explosion called a collapsar. […]

  • Astrophysicist announces her discovery that could...
    on June 12, 2019 at 8:29 pm

    A breakthrough finding overturns assumptions about the maturation of galaxies and may represent a phase of every galaxy's life cycle that was unknown until now. […]

  • Crash with Antlia 2 gave the Milky Way the...
    on June 12, 2019 at 6:13 pm

    The newly-discovered dark dwarf galaxy Antlia 2's collision with the Milky Way may be responsible for our galaxy's characteristic ripples in its outer disc, according to a new study. […]

  • Citizen scientists re-tune Hubble's galaxy...
    on June 11, 2019 at 2:27 pm

    Hundreds of thousands of volunteers have helped to overturn almost a century of galaxy classification, in a new study using data from the longstanding Galaxy Zoo project. The new investigation uses classifications of over 6000 galaxies to reveal that 'well known' correlations between different features are not found in this large and complete sample. […]

  • Astronomers determine mass of small black hole at...
    on June 10, 2019 at 3:15 pm

    Astronomers have discovered that a black hole at the center of a nearby dwarf galaxy, called NGC 4395, is about 40 times smaller than previously thought. […]


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.

  • Hubble sets sights on an explosive galaxy
    on June 14, 2019 at 5:16 pm

    When massive stars die at the end of their short lives, they light up the cosmos with bright, explosive bursts of light and material known as supernovae. A supernova event is incredibly energetic and intensely luminous—so much so that it forms what looks like an especially bright new star that slowly fades away over time. […]

  • To the Moon and back: 50 years on, a giant leap...
    on June 14, 2019 at 7:00 am

    The first four days of Apollo 11's journey to the Moon had gone according to plan, but just twenty minutes before landing, the atmosphere grew tense as the crew encountered a series of problems. […]

  • How NASA's Spitzer has stayed alive for so long
    on June 13, 2019 at 6:18 pm

    After nearly 16 years of exploring the cosmos in infrared light, NASA's Spitzer Space Telescope will be switched off permanently on Jan. 30, 2020. By then, the spacecraft will have operated for more than 11 years beyond its prime mission, thanks to the Spitzer engineering team's ability to address unique challenges as the telescope slips farther and farther from Earth. […]

  • Earth's heavy metals result of supernova explosion
    on June 13, 2019 at 4:35 pm

    That gold on your ring finger is stellar—and not just in a complimentary way. […]

  • Hubble observes tiny galaxy with big heart
    on June 13, 2019 at 2:34 pm

    Nestled within this field of bright foreground stars lies ESO 495-21, a tiny galaxy with a big heart. ESO 495-21 may be just 3000 light-years across, but that is not stopping the galaxy from furiously forming huge numbers of stars. It may also host a supermassive black hole; this is unusual for a galaxy of its size, and may provide intriguing hints as to how galaxies form and evolve. […]