Earth’s been getting hit by the fast moving high energy cosmic rays bursting off from outer space. These cosmic rays comprise positrons in a small proportion.
In 2008 PAMELA, a probe in Earth’s orbit, detected more high energy positrons approaching nearby expanse of our galaxy, but nobody was completely sure how they’re formed.
Theoretically, particles like electrons and positrons happen to form, which are abruptly whipped away with the waves, produced due to collisions. Spent analyzing the collected data, researchers ascertained pulsars to be responsible for some of the extra-high energy positrons.
A researcher from the famous Institute of Nuclear Physics Polish Academy of Sciences, Sabrina Casanova stated “Since the involvement of close-by pulsars in the generation of high-energy positrons reaching us is so modest, other explanations become more and more likely.”
The mystery of both dark matter and these mysteriously incredible fast positrons remains.