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If our universe is expanding it means a higher gravitational force is coming from outside, than why Milky way galaxy and Andromeda galaxy are coming close to each other?
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If our universe is expanding it means a higher gravitational force is coming from outside, than why Milky way galaxy and Andromeda galaxy are coming close to each other?
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Answers required from serious users and cosmos lovers only...
Best answer as brainliest
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➡️Since, both the galaxies have huge masses and we know that mass causes gravity, the galaxies will try to move towards each other with an accelerated motion.
Second, force due to dark energy :
▶️The empty space between the galaxies is actually not empty. It is presumed to contain an energy known as the dark energy which causes the spacial expansion and hence, is responsible for the motion of galaxies moving away from each other.
In the case of the Milky Way and the Andromeda, the force of gravity overcomes the effect of the latter, and hence lets the galaxies continue their inertial motion, i.e. COLLISION!!
Note * already more then 4 dwarf galaxies are merge in milky way.