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Crab Nebula
Crab Nebula
Crab Nebula A supernova remnant approximately 6500 l.y. away in the constellation Taurus; also known as M1 or NGC 1952, and as the radio source Taurus A. The Crab Nebula is the remains of a star that was seen to explode as a supernova in
ad1054, reaching a maximum apparent magnitude of −6. In telescopes it appears as an elliptical nebulosity of 8th magnitude. Its true dimensions are 11 × 7.5 l.y. Optically, the nebula has two components: an outer region of reddish, twisted filaments of hydrogen gas; and an inner, whitish core that shows no spectral features. The light from the core is
synchrotron radiation, caused by high-speed electrons from the
Crab Pulsar. It is highly polarized and is continuous at all wavelengths, from gamma-rays to radio waves. The expansion velocity of the outer filaments is about 1000 km/s. There is evidence that the expansion is accelerating, driven by the radiation from the pulsar.
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A distorted view of the Southern Crab. (nebula visible in a Southern Hemisphere constellation)
Magazine article from: Science News; 1/13/1990; 700+ words
; ...the Southern Crab The Crab nebula is one of the more famous astronomical...imagination to see the shape of a crab in its envelope of glowing...designation better suits the crab-like appearance of a recently...But why does the "Southern Crab" have this unusual shape...symbiotic starts ...
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Photo Release: Most Detailed Image of the Crab Nebula.
News Wire article from: Ascribe Higher Education News Service; 12/1/2005; 700+ words
; ...PHOTO RELEASE: Most detailed image of the Crab Nebula Image, full story and animations available on: http...gives the most detailed view so far of the entire Crab Nebula. The Crab is arguably the single most interesting object, as...
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Supernova mystery: cracking the Crab. (Crab Nebula)
Magazine article from: Science News; 6/24/1989; ; 642 words
; Supernova mystery: Cracking the Crab The crab Nebula, a patch of glowing gas representing the debris from...concerning what happens during a supernova explosion. "The Crab Nebula is one of the most studied but least understood...
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X-rays shed light on power behind Crab Nebula's lasting glow
Newspaper article from: The Milwaukee Journal Sentinel; 10/3/1999; ; 567 words
; ...brilliant ring around the heart of the Crab Nebula, a revelation that may help astronomers...pulsing neutron star at the core of the Crab gives off such tremendous energy nearly...even as researchers gazed at the Crab Nebula with optical telescopes and...
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Awash in Mystery: Crab Nebula's Rippling Dance
Newspaper article from: The Washington Post; 6/3/1996; ; 700+ words
; ...dust-and-gas cloud called the Crab Nebula. The flare was so intense that it...more than a year. Since then, the Crab has hung there, glowing quietly...he said. "In the case of the Crab Nebula, though, it's so dynamic...
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A fresh look at a familiar supernova: Hubble views the Crab. (Hubble Space Telescope adds to information about Crab nebula)
Magazine article from: Science News; 8/6/1994; ; 700+ words
; ...Earl of Rosse wrote that the object resembled a crab and named the heavenly phenomenon the Crab nebula. Today, this object, now known to be a supernova...elements derives from our knowledge about the Crab nebula?" (Astronomy of the Ancients, 1980...
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The Crab Nebula.
Magazine article from: The Review of Contemporary Fiction; 9/22/1997; ; 662 words
; ...35.00: Paper: $12.00. The celestial Crab nebula, in the constellation Taurus, is the debris...serve as metaphor for Eric Chevillard's The Crab Nebula, about a man named Crab: the volume is full of verbal debris contained...
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Gamma rays from the Crab nebula.
Magazine article from: Science News; 4/28/1990; ; 650 words
; Gamma rays from the Crab nebula The Crab nebula, the optical remnant of a stellar explosion observed more...radio waves. Now a team of astronomers has established that the Crab nebula is also a steady source of highly energetic gamma rays...
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Hubble telescope reveals dancing crab. (Hubble Space Telescope reveals that the inner part of the Crab nebula is more dynamic than previously believed)(Brief Article)
Magazine article from: Science News; 6/8/1996; ; 700+ words
; ...whirling dervish lies at the heart of the Crab nebula, the giant remnant of a blazing stellar...that the compact engine powering the Crab is a pulsar, so named because the...times a second. Yet even though the Crab ranks as one of the most thoroughly...
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Blowing Star Bubbles.(Hubble Space Telescope images of Southern Crab nebula)
Magazine article from: Odyssey; 1/1/2000; ; 583 words
; ...imaging in unprecedented detail a nebula located just a few thousand...to nickname it the Southern Crab. But the HST images reveal the Southern Crab to be a small, hourglass...happened twice in the Southern Crab's history. Astronomers speculate...that the hourglass-shaped nebulae represent ...
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Crab Nebula
Book article from: The Columbia Encyclopedia, Sixth Edition
Crab Nebula diffuse gaseous nebula in the constellation Taurus; cataloged as NGC 1952 and M1, the...have been observed in our galaxy since then. The explosion of the Crab Nebula produced a large expanding shell of delicate filaments. The...
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Nebula
Encyclopedia entry from: UXL Encyclopedia of Science
...formed. Reflection nebulae are also bright gas...as common as emission nebulae. A reflection nebula is a bluish cloud containing...In the same way, the nebula's dust scatters starlight...of this type is the Crab Nebula, an enormous...supernova explosion. Dark nebulae Dark ...
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emission nebula
Book article from: A Dictionary of Astronomy
emission nebula A luminous cloud of gas and dust in space...examples are H II regions and planetary nebulae, which are ionized by central stars...light from supernova remnants such as the Crab Nebula is produced by the process of synchrotron...
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Crab Pulsar
Book article from: A Dictionary of Astronomy
Crab Pulsar The pulsar at the heart of the Crab Nebula; also known as PSR 0531 + 21 (formerly NP 0532). The Crab Pulsar has a period of 33.08 ms and is slowing by 36.4 ns per day. The rotational energy it loses is...
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Duncan, John Charles
Dictionary entry from: Complete Dictionary of Scientific Biography
...demonstration of expansion in the Crab nebula. He is perhaps better known...own excellent photographs of nebulae and galaxies. The son of Daniel...at Steward Observatory. The Crab nebula, located in the constellation...motions in the filaments of the Crab. He later confirmed these...
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