Crab Nebula

The Crab Nebula (catalogue designations M1, NGC 1952, Taurus A) is a supernova remnant and pulsar wind nebula in the constellation of Taurus. The nebula was observed by John Bevis in 1731; it corresponds to a bright supernova recorded by Arab, Chinese and Japanese astronomers in 1054. At X-ray and gamma-ray energies above 30 keV, the Crab is generally the strongest persistent source in the sky, with measured flux extending to above 1012 eV. Located at a distance of about 6,500 light-years (2 kpc) from Earth, the nebula has a diameter of 11 light years (3.4 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 neutron star (or spinning ball of neutrons), 28–30 km across, which emits pulses of radiation from gamma rays to radio waves with a spin rate of 30.2 times per second. The nebula was the first astronomical object identified with a historical supernova explosion.

The nebula acts as a source of radiation for studying celestial bodies that occult it. In the 1950s and 1960s, the Sun's corona was mapped from observations of the Crab's radio waves passing through it, and in 2003, the thickness of the atmosphere of Saturn's moon Titan was measured as it blocked out X-rays from the nebula.

The cloudy remnants of SN 1054 are now known as the Crab Nebula. The nebula is also referred to as Messier 1 or M1, being the first Messier Object catalogued in 1758.

Read more about Crab Nebula:  Origins, Physical Conditions, Central Star, Progenitor Star, Transits By Solar System Bodies, In Popular Culture

Other articles related to "crab nebula, nebula, crab":

SN 1054 - Importance in The Development of Modern Astronomy
... Its remnant, the Crab Nebula, was one of the first to be discovered in 1731 by John Bevis ... It is in searching in vain for the comet that Charles Messier found the Crab nebula, which he at first thought to be Halley's comet ... William Herschel observed the Crab nebula numerous times between 1783 and 1809, but we do not know whether he was aware of its existence in 1783, or if he discovered it independently of Messier and Bevis ...
Southern Crab Nebula
... The Southern Crab Nebula or Hen2-104 is a nebula located, as seen from Earth, in the constellation Centaurus, but it is actually several thousand light years from our planet ... The adjective "southern" distinguishes it from the Crab Nebula, which is in the northern sky ... From Earth, it looks like the body and legs of a crab and also somewhat like an hourglass ...
SN 1054 - Nature of The Reported Event - The Problem of The Precise Localisation of The Residue - The Direction
... arises the new star is described as being to the South-East of Tianguan, while the Crab Nebula is to the North-East ... In 1972 for example, Ho Peng Yoke and his colleagues suggested that the Crab Nebula was not the product of the explosion of 1054, but that the true remnant was to the South-East, as indicated in several ... The Crab Nebula is south-south-east of β Tauri ...
Timeline Of White Dwarfs, Neutron Stars, And Supernovae
... Chinese, American Indian and Arab astronomers observe the SN 1054, the Crab Nebula supernova explosion, 1181 – Chinese astronomers observe the SN 1181 supernova, 1572 – Tycho Brahe discovers ... Duyvendak, Nicholas Mayall, and Jan Oort deduce that the Crab Nebula is a remnant of the 1054 supernova observed by Chinese astronomers, 1958 – Evry Schatzman, Kent Harrison ... William Cocke, Mike Disney, and Donald Taylor discover the Crab Nebula pulsar thus connecting supernovae, neutron stars, and pulsars, 1971 – Riccardo Giacconi, Herbert Gursky, Ed Kellogg, R ...
Crab Nebula - In Popular Culture
... programme Doctor Who, The Master says in the serial Colony in Space that the Crab Nebula was the result of the Uxariean race testing the Doomsday Weapon, which is capable of making stars go supernova ...

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