Wednesday, September 18, 2013

An Interesting Turn of Events For Proponents of MoND

The "holy grail" of a scientific theory is one that can make accurate predictions of phenomena in advance. Recently, a group of researchers developing Modified Newtonian Dynamics (MOND), which is a modified law of gravity, successfully predicted the motions of 10 dwarf galaxies in orbit around the Andromeda galaxy in advance. This could be a huge leap forward for MOND. What is MOND? MOND is an alternative to dark matter and attempts to explain the gravitational discrepancies seen in the motions of galaxies. In the early 20th century, astronomers discovered galaxies were moving in a way that didn't make sense with all of the observable matter. This lead to the shocking realization that either there is an invisible substance adding to the mass of the galaxy, or our current laws of gravity were incomplete. Dark matter appeals to the first solution and MOND appeals to the second. Thus far, dark matter has proven itself to be a more reliable theory, providing a little more accuracy when describing the motions of galaxies, but it has some deep seeded problems. The winds might be changing as MOND is developed further.

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