New mystery object could be lightest black hole ever seen 

 The MeerKat Radio Telescope discovered an unknown object in the Milky Way heavier than the largest neutron star but lighter than the smallest black holes. 

https://cdn.mos.cms.futurecdn.net/vTP3gJHHgDBFoZ4NTCGzcT.png

https://www.space.com/mystery-object-lightest-black-hole-heaviest-neutron-star