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What is dark matter?
What are the effects of both dark matter and dark energy?
What are the effects of both dark matter and dark energy?
So does dark energy exerts some kind of anti-gravity?Nobody knows exactly what they are which is partly why they are called 'dark'.
They both are observed indirectly by their effects but the cause is unknown.
In the case of dark matter something unseen is causing gravatitational effects so it has to be some kind of matter.
It's widely suspected to be some kind of subatomic particle which has so far not been detected.
That is not the only theory, but experimental work is in progress to try to detect such particles.
Dark energy is even more mysterious. Something seems to be causing the Universe to expand, (although that is in the large scale, individual galaxies are not expanding)
Not any more-so than magnetic levitation would be anti-gravity. When gravity pulls two objects together, they move through spacetime to get to each other. When dark energy pushes two objects apart, it does so by literally adding more space in between them.So does dark energy exerts some kind of anti-gravity?
When gravity pulls two objects together, they move through spacetime to get to each other. When dark energy pushes two objects apart, it does so by literally adding more space in between them.