Crab Nebula

In 1054, Chinese astronomers noticed a "guest star" that was visible in the daytime sky for about a month. The "guest star" they saw was a supernova explosion that produced the Crab Nebula, a six-light-year-wide remnant of the cosmic event.
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The Crab Nebula can be seen with a modest telescope and is best visible in January, with an apparent magnitude of 8.4 and a distance of 6,500 light-years from Earth in the constellation Taurus.
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This one taken last year with advance capture settings where I needed to select filter selection, exposure and coordinates but I processed it today. The orange filaments are the tattered remains of the star and consist mostly of hydrogen. The blue in the filaments in the outer part of the nebula represents neutral oxygen. Green is singly ionized sulfur, and red indicates doubly ionized oxygen. These elements were expelled during the supernova explosion.
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