Messier1 (M1, Crab Nebula)

In 1054, a guest star is visible in daytime sky for nearly a month. This took notice of a Chinese astronomer. The guest star they observed was a supernova explosion which give birth to the Crab Nebula

Crab nebula (Credit:NASA, ESA, J. Hester and A. Loll (Arizona State University)

Crab nebula  was located 6,500 light years away from Earth with the magnitude of 8.4.

This Crab nebula was located in the constellation Taurus. This can seem using a small telescope in the month January.

Credits: Image courtesy of Stellarium

Radius: 5.5 light years

Age: 1,001 years

Distance to Earth: 6,523 light years

Magnitude: 8.4

Absolute magnitude: -3.1

Coordinates: RA 5h 34m 32s | Dec +22° 0′ 52″

Apparent magnitude (V): 8.4

Crab nebula was discovered by John Beuis in 1731, and later observed by Charles Messier who mistook it for Halley's Comet. The colors in the image won't be same as viewing with eyes.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. A rapidly spinning neutron star (the ultra-dense core of the exploded star) is embedded in the center of the Crab Nebula. Electrons whirling at nearly the speed of light around the star’s magnetic field lines produce the eerie blue light in the interior of the nebula. The neutron star, like a lighthouse, ejects twin beams of radiation that make it appear to pulse 30 times per second as it rotates.. 

For more information visit the links below:

▪https://hubblesite.org/contents/news-releases/2016/news-2016-26.html

(Credit: NASA)

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