The Jellyfish Nebula, IC 443, is a supernova remnant about 5,000 light-years away in the constellation Gemini. The shock wave from the explosion glows as it collides with surrounding molecular clouds. The nebula's apparent diameter on the sky is larger than the full moon. Estimates of its age range from 3,000 to 30,000 years.

Compare the Jellyfish to other supernova remnants, the Crab and the Veil Nebulae.

On May 19, 2023 a new supernova was observed in galaxy M101.

104 minutes L and 120 minutes RGB (binned 2x2) on 2016-03-08 plus 224 minutes through an Astrodon 3 nm H-a filter (blended with L and R) using a QSI 583 on 2016-03-07 from northern New Jersey through an Astro-Physics 105mm refractor at f6.2. North is up. ©2016

The Jellyfish Nebula in hydrogen-alpha light.

224 minutes through an Astrodon 3 nm H-a filter using a QSI 583 on 2016-03-07 from northern New Jersey through an Astro-Physics 105mm refractor at f6.2. North is up. ©2016