planet

Astronomers using NASA’s Hubble Space Telescope have discovered a ghostly ring of dark matter that formed long ago during a titanic collision between two galaxy clusters. The ring’s discovery is among the strongest evidence yet that dark matter exists.

“This is the first time we have detected dark matter as having a unique structure that is different from both the gas and the galaxies in the cluster,” said astronomer James Jee of Johns Hopkins University. Jee is a member of the team that spotted the dark matter ring.

The ring, which measures 2.6 million light-years across, was found in the cluster CL0024+17, located 5 billion light-years from Earth. link

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