False-color infrared image of supernova remnant IC 443. Blue shows expanding gas rich in iron, while red wisps show shock-excited molecular hydrogen impacting a molecular cloud, potentially accelerating particles near light speed. The remnant is the result of a stellar explosion approximately 8000 years ago.

Astronomy Picture from 21/07/1999

Galactic Supernova Remnant IC 443

Source: https://apod.nasa.gov/apod/ap990721.html


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