The article discusses the phenomenon of dark matter, which constitutes over a quarter of the universe's matter and cannot be seen directly. It explains how the gravitational effects of dark matter warp space-time and distort the light from distant galaxies. Theoretical physicist Chanda Prescod-Weinstein notes that dark matter must be non-interactive with light and must move slowly to facilitate galaxy formation. The article also speculates on the possibility of the axion, a hypothetical particle that could potentially provide answers to the dark matter mystery. Scientists continue to explore these unknown elements of our universe.
The combined gravity of all the regular and dark matter inside the cluster warps space-time and affects images of galaxies behind the cluster.
When we look at how stars move in galaxies, they move as if there is a lot of matter there that we can't see.
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