Astronomers have discovered a mysterious object emitting a radio wave beam that pulsed every 20 minutes.(no it probably isn't aliens)The team behind the discovery believe the object could be a new class of slowly rotating neutron star with an ultra-powerful magnetic field. The repeating signals were detected during the first three months of 2018, but then disappeared, suggesting they were linked to a dramatic, one-off event, such as a starquake.
