- #1
Zerger
- 5
- 0
If galaxies fly apart from each other with ACCELERATION, why is the term "universal attraction" used and not "universal repulsion"?
To expand on @kuruman's question, why do you think it is not possible for two things to attract each other even while one accelerates away from the other? How do rockets leaving Earth act?Zerger said:If galaxies fly apart from each other with ACCELERATION, why is the term "universal attraction" used and not "universal repulsion"?
The Milky Way and Andromeda galaxies are on a collision course, due to their mutual gravitational attraction. See, for example:Zerger said:If galaxies fly apart from each other with ACCELERATION, why is the term "universal attraction" used and not "universal repulsion"?
And ... so much for the Socratic Method.PeroK said:The Milky Way and Andromeda galaxies are on a collision course, due to their mutual gravitational attraction. See, for example:
https://en.wikipedia.org/wiki/Andromeda–Milky_Way_collision
At the largest cosmological scales, so-called dark energy (energy of the vacuum) dominates gravitational attraction and results in an accelerating expansion of the universe.
Why do you think that two objects cannot repel each other, even if one is accelerating toward the other?Which should be exemplified - all rocks or all galaxies?phinds said:To expand on @kuruman's question, why do you think it is not possible for two things to attract each other even while one accelerates away from the other? How do rockets leaving Earth act?
Answering my question with a strawman does not answer my question, even though you seem to think that it does.Zerger said:Why do you think that two objects cannot repel each other, even if one is accelerating toward the other?Which should be exemplified - all rocks or all galaxies?
The force pushing the entire universe is the force of universal repulsion. Ok?PeroK said:The Milky Way and Andromeda galaxies are on a collision course, due to their mutual gravitational attraction. See, for example:
https://en.wikipedia.org/wiki/Andromeda–Milky_Way_collision
At the largest cosmological scales, so-called dark energy (energy of the vacuum) dominates gravitational attraction and results in an accelerating expansion of the universe.
Where is the term "universal attraction" used? Please provide some specific references that use that term. Two words taken out of context are not particularly meaningful.Zerger said:why is the term "universal attraction" used
Not OK!Zerger said:The force pushing the entire universe is the force of universal repulsion. Ok?
Ok.PeroK said:Not OK!
Objects moving away from each other experience attraction or repulsion due to the force of gravity or electromagnetic forces acting between them. These forces can cause the objects to accelerate towards each other or move further apart.
The strength of attraction or repulsion between objects moving away from each other is influenced by the masses of the objects, the distance between them, and the nature of the forces acting between them (such as gravity or electromagnetic forces).
Yes, objects moving away from each other with acceleration can eventually come to a stop and reverse direction if the forces acting between them change in such a way that they overcome the initial acceleration and cause the objects to move towards each other instead.
The acceleration of objects moving away from each other can affect the strength of attraction or repulsion between them by changing the forces acting between them. For example, if the acceleration increases, the objects may move further apart due to stronger repulsive forces.
Yes, one real-life example of attraction between objects moving away from each other with acceleration is the motion of planets in our solar system. Despite moving away from each other due to their initial velocities, the gravitational forces between them cause them to orbit around the sun and attract each other.