MYSTERIOUS emissions of gamma rays at the heart of our galaxy could be a clue that some of the universe’s dark matter takes the form of exotic stars made of invisible “mirror matter”.
The existence of mirror matter is hotly debated. It was originally invoked to restore nature’s flawed left-right symmetry which, for instance, results in a neutrino with left-handed spin but not a right-handed one. For every known particle there would be a mirror partner of a similar mass – for example, a mirror electron for the electron. But evidence to back up this idea is sparse.
The gamma rays…
