An interesting alternative theory suggests a different explanation on gravitational forces around the outer edges of galaxies, which questions the existence of “dark matter” and all its mystery. Discovery reports:
Aug. 3, 2007 — The mysterious dark matter that’s been called on to make sense of the ways galaxies twirl through space may not exist, if an alternative theory is right. |
The surprising way galaxies rotate — as if they are much larger and heavier than they appear to be — has long implied to astronomers and astrophysicists that there is more matter out there holding things together than we see. |
That unseen and unseeable matter has fallen under the catch-all term “dark matter.” These days, the most likely candidate for what makes up dark matter is some sort of weakly interacting particle that we’ve so far failed to detect. |
But there is another radically different possibility: What if gravity itself doesn’t work quite the way we think? Maybe at the outer edges of galaxies where the gravitational acceleration — the g — of a galaxy is extremely small, gravity tugs just a tad bit more. |
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