Gamma rays from galaxy centre may signify less massive missing particles.

Gamma rays streaming from the centre of our galaxy could be the signature of elusive dark matter, astrophysicists claim. The rays support an exotic theory about dark matter: that it consists…

of very light particles.

Physicists know that a large proportion of the universe’s mass cannot be accounted for by objects we can see, such as stars and planets. In galaxies such as our own, there could be as much as ten times more dark matter than normal matter.

One popular idea suggests that the ‘missing’ dark matter consists of as yet unidentified subatomic particles that are….

Full story here.