Scientists may have found an explanation for the invisible walls in space that hold galaxies in orbit around larger galaxies.
An image of the Southern Pinwheel Galaxy as captured by the DECam. Image source: NOIRLab
According to that model, small galaxies should be distributed in messy orbits around larger galaxies. However, most small galaxies orbiting larger galaxies are arranged in thin flat planes. These planes, or disks, look similar to the rings of Saturn. Almost as if there is some invisible wall in space that the galaxies arrange along.
The researchers posit that their research points towards a first potential “new physics” explanation that doesn’t do away with dark matter completely. Dark matter makes up most of the mass in the universe and has proven to be one of theUnlike past studies into the issue, this new research suggests that hypothetical particles called symmetrons could generate invisible walls in space. Astronomers call these walls “domain walls” and they are what hold the galaxies in their refined orbits.
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