Crab Nebula

This is a mosaic image, one of the largest ever taken by NASA’s Hubble Space Telescope of the Crab Nebula, a six-light-year-wide expanding remnant of a star’s supernova explosion. Japanese and Chinese astronomers recorded this violent event nearly 1,000 years ago in 1054, as did, almost certainly, Native Americans.

The orange filaments are the tattered remains of the star and consist mostly of hydrogen. The rapidly spinning neutron star embedded in the center of the nebula is the dynamo powering the nebula’s eerie interior bluish glow. The blue light comes from electrons whirling at nearly the speed of light around magnetic field lines from the neutron star. The neutron star, like a lighthouse, ejects twin beams of radiation that appear to pulse 30 times a second due to the neutron star’s rotation. A neutron star is the crushed ultra-dense core of the exploded star.

The Crab Nebula derived its name from its appearance in a drawing made by Irish astronomer Lord Rosse in 1844, using a 36-inch telescope. When viewed by Hubble, as well as by large ground-based telescopes such as the European Southern Observatory’s Very Large Telescope, the Crab Nebula takes on a more detailed appearance that yields clues into the spectacular demise of a star, 6,500 light-years away.

The newly composed image was assembled from 24 individual Wide Field and Planetary Camera 2 exposures taken in October 1999, January 2000, and December 2000. The colors in the image indicate the different elements that were expelled during the explosion. 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.


January 6, 2011 – Fermi’s Large Area Telescope Sees Surprising Flares in Crab Nebula

Each of the two flares the LAT observed lasted a few days before the Crab Nebula’s gamma-ray output returned to more normal levels. According to Funk, the short duration of the flares points to synchrotron radiation, or radiation emitted by electrons accelerating in the magnetic field of the nebula, as the cause. And not just any accelerated electrons: the flares were caused by super-charged electrons of up to 1015 electron volts, or 10 quadrillion electron volts, approximately 1,000 times more energetic than the protons accelerated by the Large Hadron Collider in Europe, the world’s most powerful man-made particle accelerator, and more than 15 orders of magnitude greater than photons of visible light.

“The strength of the gamma-ray flares shows us they were emitted by the highest-energy particles we can associate with any discrete astrophysical object,” Funk said. January 6, 2011 – Fermi’s Large Area Telescope Sees Surprising Flares in Crab Nebula-Date Issued: January 6, 2011 Contact: Melinda Lee, SLAC Media Manager

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3 Responses to Crab Nebula

  1. Hey check out my own blog and the fascinating galaxy-sized green-blob called Hanny's Voorweep. We share a great love of all things astronomy and many other subjects/fields of study.Btw, good luck on procuring those mining rights to Arcturus crater on the moon, but if I get there first and mine away and pay you nothing, what are you going to do? Sue me in the Hague? Come and get me! Finders keepers! lol

  2. Plato says:

    Steven:but if I get there first and mine away and pay you nothing, what are you going to do? Sue me in the Hague? Come and get me! Finders keepers! Ha! since when is copying "my attitude" going to get you anywhere?:)Plato's Nightlight Mining Company is claiming Aristarchus Crater and Surrounding RegionJust because those astronauts stood on the moon, I felt the same way:) I thought it was a good time to introduce a new version of law, instead of mariner law, how about "other worldly law" and land rights? "Lunatics:)"It had to become an issue right…in the future toward land claims? Thought I'd mix it up with the land claim historical runs in the early years of American literature pertaining to the ole wild west.Yes I am looking at your link right now.Best,

  3. Plato says:

    Scary to think this "wild west" might "en fringe" on how Palin's justice is somehow metered out( Cross hairs on a part of the country) as a "microscope perhaps on how a democratic society has gone rogue according too, one's own "political eye" as a consequence of, pertaining to events just past. The "cross hairs" were taken literally? Fueling that fringe?Best,

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