Thread: spiral arm
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Old 09.24.2009, 06:26 PM   #7
floatingslowly
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it has to be pretty dark for it to look anything like what rob just posted.

on clear nights, in residential areas, it almost looks like high clouds.

it runs in a 60* arc against the ecliptic (the moon runs at 5*).

also, what is visible is the galactic bulge. the darkened bands seen are the result of dust clouds between our position and the center (a supermassive black hole named Sagittarius A*).

as rob mentioned, the earth lies within a spiral arm. the brighter stars in the sky are all our neighbors.
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