Answer:
the answer for this is my.
Answer:
because they may not actually be moving be just percieved as so
Explanation:
ANSWER:
What effect does a catalyst have on a system in equilibrium?
The system is unaffected.
~batmans wife dun dun dun....
The spiral structure of the milky way can be explained by long lived quasi-static density waves<em>, </em><em>according to the lin-shu hypothesis. </em>Curiously, the waves of higher density gas and stars (seen as spiral arms) appear to remain static as stars move around the galaxy. This explained by assuming that the gravitational disturbances cause by the 'clumping' material in the arms does not affect the gravitational field of the galaxy as whole and is therefore negligible.
source: Astrophysicist
Answer:
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