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- Galaxies - NASA Science
Galaxies consist of stars, planets, and vast clouds of gas and dust, all bound together by gravity The largest contain trillions of stars and can be more than a million light-years across The smallest can contain a few thousand stars and span just a few hundred light-years
- Definition, Formation, Types, Properties, Facts - Britannica
Galaxies differ from one another in shape, with variations resulting from the way in which the systems were formed and subsequently evolved Galaxies are extremely varied not only in structure but also in the amount of activity observed
- Galaxy Facts - Interesting Facts about Galaxies - Space Facts
There are probably more than 170 billion galaxies in the observable universe Astronomers sort galaxies into three main types by their shapes: spirals, ellipticals, and irregulars, and further divide them into subtypes based on their particular characteristics Find out more about one of the galaxies by selecting it below
- Galaxies—facts and information | National Geographic
Galaxies are sprawling systems of dust, gas, dark matter, and anywhere from a million to a trillion stars that are held together by gravity Nearly all large galaxies are thought to also
- Galaxies: Collisions, Types and How Theyre Made | Space
Galaxies are composed of stars, dust and dark matter, all held together by gravity Astronomers aren't certain exactly how galaxies formed After the Big Bang, space was made up almost entirely
- Galaxies - Imagine the Universe!
Galaxies can be found by themselves, in small groups and in large clusters It is very rare to find stars in the space in between galaxies Galaxies sometimes collide with each other, with interesting results These collisions can trigger bursts of star-formation in addition to changing the shapes of the galaxies that collide
- What Are Galaxies? (With Understandable Details) - Owlcation
Elliptical galaxies are three-dimensional galaxies that appear as an ellipse regardless of the angle viewed There is no central bulge Elliptical galaxies may be distorted galaxies with stars orbiting under gravity around a supermassive black hole The distortion may be a consequence of a past collision
- How Galaxies Work - HowStuffWorks
Galaxies are large systems of stars, gas, dust and dark matter that orbits a center and is bound by gravity Learn about the characteristics of galaxies
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