News Astronomy A celestial loner might be the first known rogue black hole Detected by gravitational lensing, the interstellar wanderer may be a hefty neutron star instead A hefty but compact object in our galaxy might be the first known isolated stellar-mass black hole (one illustrated), or it might be a heavy neutron star. NASA and G. Bacon/STScI Share this:EmailFacebookTwitterPinterestPocketRedditPrint By Katherine Kornei June 14, 2022 at 7:00 am A solitary celestial object — more massive than the sun, yet far smaller — is wandering the galaxy a few thousand light-years from Earth.