The Veil Nebula is the expanding debris of a massive star that exploded ~8,000 years ago, located about 2,100 light-years away in Cygnus.
This Hubble image shows a tiny 2-light-year section of a much larger structure spanning 110 light-years. The glowing filaments are shock waves from the explosion colliding with interstellar gas.
Colors reveal different elements: red (hydrogen), green (sulfur), and blue (oxygen). Some of these filaments are moving at nearly 1 million miles per hour.
By comparing images taken decades apart, astronomers can actually track how the nebula is expanding over time.
Credits:- NASA
by astro_naren_06