991,775
edits
Changes
mLine 22:
Line 22: − + Line 95:
Line 95: − +
KS update 1.3
The nebula is about 6,500 [[light-year]]s (2 [[parsec|kpc]]) from [[Earth]]. It has a diameter of 11 [[light-year|ly]] (3.4 [[parsec|pc]]) and expands at a rate of about 1,500 kilometers per [[second]]. It is part of the [[Perseus Arm]] of the [[Milky Way Galaxy]].
The nebula is about 6,500 [[light-year]]s (2 [[parsec|kpc]]) from [[Earth]]. It has a diameter of 11 [[light-year|ly]] (3.4 [[parsec|pc]]) and expands at a rate of about 1,500 kilometers per [[second]]. It is part of the [[Perseus Arm]] of the [[Milky Way Galaxy]].
At the center of the nebula lies the '''Crab pulsar''', a [[pulsar|neutron star]] (or spinning ball of neutrons), 28–30 km across,<ref>
At the center of the nebula lies the '''[[Crab pulsar]]''', a [[pulsar|neutron star]] (or spinning ball of neutrons), 28–30 km across called the [[crab pulsar]] (PSR B0531+21)<ref>
{{cite web
{{cite web
|title=Crab Nebula: the spirit of Halloween lives on as a dead star creates celestial havoc
|title=Crab Nebula: the spirit of Halloween lives on as a dead star creates celestial havoc
File:The Crab Nebula - A Flickering X-ray Candle.ogv|Data from orbiting observatories show unexpected variations in the Crab Nebula's X-ray output, likely tied to the environment around its central neutron star.
File:The Crab Nebula - A Flickering X-ray Candle.ogv|Data from orbiting observatories show unexpected variations in the Crab Nebula's X-ray output, likely tied to the environment around its central neutron star.
File:NASA's Fermi Spots 'Superflares' in the Crab Nebula.ogv|NASA's [[Fermi Gamma-ray Space Telescope|Fermi]] spots 'superflares' in the Crab Nebula.
File:NASA's Fermi Spots 'Superflares' in the Crab Nebula.ogv|NASA's [[Fermi Gamma-ray Space Telescope]] spots 'superflares' in the Crab Nebula.
</gallery>
</gallery>
== References ==
== References ==