https://www.vice.com/en_us/article/qjbmzm/record-breaking-antimatter-beam-in-deep-space-discovered-by-scientists

Astronomers have discovered an enormous beam made of matter and antimatter that extends for 40 trillion miles across interstellar space, making it the largest apparent structure of its kind ever spotted, reports a new study. 

The record-breaking jet is shooting out of a pulsar, a type of rapidly spinning dead star, located some 1,600 light-years from Earth. Pulsars have incredibly strong magnetic fields and this particular object, known as PSR J2030+4415 (or J2030 for short), is spinning at a mind-boggling clip of three times per second.