Facts about the Crab Nebula
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Decades of observations show the Crab Nebula's brightness at X-ray wavelengths varies by up to 10 percent, with unexplained flares occasionally doubling its emission from the pulsar wind nebula.
- 06
Observations across multiple wavelengths from radio to gamma rays reveal the Crab Nebula's complex structure, with the pulsar's wind creating a distinctive double-lobe morphology visible in X-ray imagery.
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Energy equivalent to 100,000 suns powers the Crab Nebula's synchrotron radiation, making it the brightest persistent source of X-rays in the sky.
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Filaments of glowing gas within the Crab Nebula contain iron, sulfur, and oxygen ejected from the supernova explosion, detectable through spectroscopic analysis.
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Approximately 6,500 light-years away, the Crab Nebula expands at roughly 1,500 kilometers per second, allowing astronomers to calculate its age and distance using measurable expansion rates.
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In 1054, Chinese astronomers documented a guest star explosion visible in daylight, the supernova event that created the Crab Nebula we observe today.
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Rotating 30 times per second, the pulsar at the Crab Nebula's center was discovered in 1968 by Jocelyn Bell Burnell and colleagues.