We can potentially directly measure the gravitational effects of dark matter if we drop a reflective ball 100 AU away from the Sun - Universe Today by AndyTomaswick
has long been a mystery to astronomers, in no small part because it is so hard to measure directly. Its influence is plain when looking at its gravitational effects on objects such as far away galaxies, but measuring that influence directly has proved much trickier. But now, a team of scientists thinks they have a way to measure the influence of dark matter directly – all it would require is a specialized probe that sits really far away from Earth for a while.
Dark matter’s lesser influence doesn’t seem to make sense, given that it accounts for up to 95% of the galaxy’s gravitational pull. However, that disparity seems to be due to the distance between objects in the solar system and the vast majority of dark matter in the galaxy. Dark matter is clustered in a halo around the outside of the galaxy. Since our solar system isn’t very near the edge, dark matter’s impact on objects within the solar system is minimized even more.
France Dernières Nouvelles, France Actualités
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