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OpenStudy (anonymous):

why the ptolemaic theory seems logical based on daily observations of the rising and setting of the sun?

OpenStudy (anonymous):

how far is galaxy a from earth, and how fast is it moving away from earth?

OpenStudy (anonymous):

The Milky Way is our home galaxy. A galaxy is made up of trillions of stars. One of those stars in the Milky Way is our Sun. So Earth isn't "far" from a galaxy, it's surrounded by one! :-)

OpenStudy (anonymous):

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