The Jellyfish Nebula - IC 443, is a supernova remnant located in the constellation Gemini.=MsoNormalThe filament structures within the Jellyfish Nebula are composed of ionized gas and dust remnants from the massive star that exploded in a supernova event.
Over time, these filaments evolve and change as they interact with the ambient medium. The varying densities of the surrounding material lead to the creation of intricate patterns and textures within the nebula.
The filaments are predominantly composed of hydrogen gas that becomes ionized due to the intense radiation from nearby stars and the remnants of the supernova itself. As this is a HSO rendition, the orange regions show higher concentrations of S2, while more reddish regions contain less S2 (and predominantly Ha emissions)
The blueish O3 shell is clearly visible - often observed in abundance in the outer layers of the remnant, creating a distinct outer region of the shock wave.
“It is important to note that it is distinct from the Medusa Nebula (Abell 21), despite their similar names and visual resemblances. While both objects share the commonality of being named after jellyfish (Medusa being the scientific name for jellyfish), IC 443 is a supernova remnant, not a planetary nebula like Abell 21.
The origin of the supernova is associated with the Pulsar Wind Nebula, pinpointed to the neutron star CXOU J061705.3+222127. A jet-like structure within IC 443 has been identified, believed to emanate from the neutron star. The distance to IC 443 is approximately 1.9 kiloparsecs (6200 light-years), and its age is estimated to be around 30,000 years. (
https://www.deepskycorner.ch/obj/ic443.de.php, translated)
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