Traveling deep into the core of M20 one encounters a stellar nursery where two exhaust jets arise from the dense gaseous cloud like antennae from a snail’s head. HST palette. See Hubb...
A faint bubble shape supernova remnant (a.k.a SNR G116.9+02) in Cassiopeia ~7500-10000 years old and ~9500 ly away. A mixed-morphology supernova remnant with its shell visible in both o...