Galaxy
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.jpg) NGC 4414, a typical spiral galaxy in the constellation Coma Berenices, is about 55,000 light-years in diameter and approximately 60 million light-years away from Earth. |
A galaxy is a massive, gravitationally bound system consisting of stars, stellar remnants, an interstellar medium of gas and dust, and an important but poorly understood component called dark matter. The word galaxy is derived from the Greek galaxias (), literally "milky", a reference to the Milky Way galaxy. Examples of galaxies range from dwarfs with as few as ten million (107) stars to giants with a hundred trillion (1014) stars, each orbiting their galaxy's own center of mass.
- See also: Wikipedia, Wiktionary, Wikibooks
- Related: Dark galaxy, Galactic orientation, Galaxy formation and evolution, Luminous infrared galaxy, Supermassive black hole
| Galaxies, SEDS Messier pages Galaxies, SEDS Messier pages www.seds.org/messier/galaxy.html - Web |
| An Atlas of The Universe An Atlas of The Universe www.atlasoftheuniverse.com - Web |
| Galaxies — Information and amateur observations Galaxies — Information and amateur observations www.nightskyinfo.com/galaxies - Web |
Gallery for «Galaxy»
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| The Oldest Galaxy Yet Found The Oldest Galaxy Yet Found science.nasa.gov/headlines/y2002/08feb_gravlens.htm - Web |
| Galaxy classification project, harnessing the powe... Galaxy classification project, harnessing the power of the internet and the human brain www.galaxyzoo.org - Web |
| How many galaxies are in our universe? How many galaxies are in our universe? www.physics.org/facts/sand-galaxies.asp - Web |
| The most beautiful galaxies on Astronoo The most beautiful galaxies on Astronoo www.astronoo.com/en/galaxies.html - Web |
| 3-D Video (01:46) - Over a Million Galaxies of Bil... 3-D Video (01:46) - Over a Million Galaxies of Billions of Stars each - BerkeleyLab/animated. www.youtube.com/watch?v=08LBltePDZw - Web |
