A new radio signal from deep space is once again challenging our understanding of these mysterious phenomena.
are the collapsed cores of massive stars that have ended their lives and ejected most of their material into space. No longer supported by the outward pressure of fusion, the core collapses into an incredibly dense object, around 20 kilometers across, but up to an estimated 2.3 times the mass of the Sun.
There's just one problem: although it's unclear how far FRB 20191221A traveled, it has probably come from another galaxy, and its outburst appears to be over a million times brighter than magnetars and pulsars in our own galaxy.."Examples that we know of in our own galaxy are radio pulsars and magnetars, which rotate and produce a beamed emission similar to a lighthouse. And we think this new signal could be a magnetar or pulsar on steroids.
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