Mysterious Galactic Glow and Dark Matter
A faint but powerful glow of gamma rays from the center of the Milky Way galaxy has puzzled astronomers for decades.
Researchers from Johns Hopkins University believe this strange light could be a clue to uncovering the universe's greatest mystery: dark matter.
the invisible substance thought to make up most of the cosmos
This discovery may be the first sign of dark matter, a substance that has been elusive to scientists.
Author's summary: Astronomers find a clue to dark matter.