Sun Gobbles up Dark Matter

From Physicsworld.com


Is the Sun gobbling up dark matter?

Calculations made by a physicist in Italy suggest that the observable changes to Earth's orbit could be caused by the Sun's appetite for dark matter. This latest research predicts that over the next few billion years the orbits of the planets should shrink considerably, with the Earth to Sun distance halving over this timescale.

Physicists believe that some 23% of the mass-energy content of the universe is made up of dark matter, a non-luminous substance that interacts gravitationally with ordinary matter. This dark matter is spread throughout the universe but clumps together at higher densities in the vicinity of visible bodies, thereby forming a "halo" around the Milky Way. Some researchers also believe that the solar system is home to an especially dense lump of dark matter.

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