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What is a satelite galaxy?
Our sun is part of a massive collection of stars in the Milky Way galaxy. These hundreds of billions of stars orbit the galaxy’s center. But did you know that there are things that are even bigger orbiting the Milky Way’s center? Other galaxies orbit it too!
These less massive galaxies have their own impressive collection of stars, which all orbit their own center; but the galaxies and everything in them orbit our galaxy too.
It’s as if our galaxy is the sun and those other galaxies are planets. Astronomers call them “satellite galaxies.”
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Where are they and what are they like?
Unlike our spiral galaxy, this one lacks a clean spiral shape. Some scientists think that is because the Milky Way and other galaxies are pulling and warping it.
In terms of distance, there are two contenders for closest satellite galaxy. One group of stars is small enough ...
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Where does one galaxy start and the other end?
Some scientists don't thinkthe Canis Major cluster of stars is actually its own galaxy or dwarf galaxy. Instead they think it is just a dense area of faraway stars that are still part of the Milky Way.
Either way, it is clear that this bunch of stars has been pulled very close to our Milky...
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Where does one galaxy start and the other end?
Some scientists don't thinkthe Canis Major cluster of stars is actually its own galaxy or dwarf galaxy. Instead they think it is just a dense area of faraway stars that are still part of the Milky Way.
Either way, it is clear that this bunch of stars has been pulled very close to our Milky...
There’s No Easy Answer To The Question Of Alien Life
- It’s estimated that 20 percent of all stars have Earth-like planets orbiting them in the Goldilocks Zone . ( a region capable of sustaining life because it’s not too distant from its star to be an icy wasteland, but not close enough to fry its inhabitants)
- There are ...
"Technically, what is going on is that the Earth, Sun and all the planets are orbiting around the center of mass of the solar system," writes Cathy Jordan, a Cornell University Ask an Astronomer contributor.
"...
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