الأربعاء , يونيو 17 2020

Dark matter flits through collisions

dark matter map of a galaxy

The presence of dark matter (in blue) is inferred because it warps the light passing through it

By observing multiple collisions between huge clusters of galaxies, scientists have witnessed dark matter coasting straight through the turmoil.

Dark matter is the mysterious, invisible stuff that makes up 85% of the matter in the cosmos – and these results rule out several theoretical models put forward to explain it.

This is because it barely interacts with anything at all, including the dark matter in the oncoming galaxies.

The work appears in Science magazine.

To conduct their study, astrophysicists looked at 72 smash-ups between galactic clusters, using two space telescopes: visible light was recorded by the Hubble Space Telescope, and X-rays by the Chandra Observatory.

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