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Topic: Nebula


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In the News (Sun 19 Nov 17)

  
  Nebula - LoveToKnow 1911
An enumeration of nebulae was made by Charles Messier in Paris in 1771, who recorded 103; Sir William Herschel increased the number known to over 250o; whilst Sir John Herschel between 1825 and 1847 catalogued and described 3926 nebulae (including 1700 observed at the Cape of Good Hope).
Nebulae may be conveniently classified according to their telescopic appearance; we enumerate below some of the principal forms that have been recognized, but it must be observed that this classification is rather superficial, and that the differentiation is often one of appearance only and not of real structure.
The typical spiral nebulae are in the form of a double spiral, the two branches of which proceed from diametrically opposite points of a bright nucleus and wind round it in the same sense; the whole is generally studded with points of condensation.
www.1911encyclopedia.org /Nebula   (1858 words)

  
 nebula. The Columbia Encyclopedia, Sixth Edition. 2001-07
In 1864, William Huggins confirmed William Herschel’s conclusion that nebulae are not swarms of stars by determining that the spectra of nebulae are made of bright lines characteristic of radiating gases.
Some bright nebulae, composed primarily of hydrogen gas ionized by nearby hot blue-white stars, radiate their own light; they are called emission nebulae and are characterized by narrow spectral emission lines.
Dark nebulae are detected as empty patches in a field of stars or as dark clouds obscuring part of a bright nebula in the background, as in the case of the Horsehead Nebula.
www.bartleby.com /65/ne/nebula.html   (415 words)

  
  Nebula - Marvel Universe: The definitive online source for Marvel super hero bios.
Nebula hoped to conquer the Skrull empire, at the time in the throes of chaos as their throneworld was destroyed by the planet-destroyer Galactus.
Nebula was later summoned to the side of Thanos, who had at the time assembled the Infinity Gems to create the Infinity Gauntlet and thereby give himself omnipotent power.
Thanos scoffed at Nebula's claims to be his granddaughter, and as a gift to the embodiment of Death, transformed her into a hideous "living sculpture" of pain and living death.
www.marvel.com /universe/Nebula   (731 words)

  
 Nebula - MSN Encarta
Nebula, in astronomy, a localized conglomerate of the gaseous and finely divided dust particles that are spread throughout interstellar space.
Nebulas of this kind are strong emitters of radio waves, as a result of the explosions that formed them and the probable pulsar remnants of the original star.
Dark, diffuse nebulas are observed as nonluminous clouds or faintly luminous, obscuring portions of the Milky Way and too distant from the stimulation of neighboring stars to reflect or emit much light of their own.
encarta.msn.com /encnet/refpages/RefArticle.aspx?refid=761560343   (523 words)

  
  NEBULA   (Site not responding. Last check: )
Nebula claims to be the granddaughter of Thanos, and although there is no genetic evidence to support her claim she is certainly a worthy heir to his ideals.
Nebula asks where all the evidence of casualties is. She says that an entire armada was based down there and all of them couldn’t have been obliterated.
Nebula says that with the exception of her continuing to retain the gauntlet she is going to change everything back to the way it was twenty-four hours ago.
www.leaderslair.com /marvelvillains/nebula.html   (6610 words)

  
 Nebula - CreationWiki, the encyclopedia of creation science
Nebula (the Latin word for "mist"), was used originally to refer to any cloudy astronomical object including galaxies.
Nebulae are believed by secular cosmologists to be the birthplace of stars.
Stellar formation is hypothesized to occur when these clouds of gas and dust collapse under their own gravity into a ball of plasma to form a star.
creationwiki.org /Nebula   (158 words)

  
 Black Holes: Research Links for Students
Nebula is a cloud of dust particles and gases in space.
Indeed, a nebula is a cosmic cloud of gas and dust floating in space.
The gas in nebulae (the plural of nebula) is mostly hydrogen gas (H2).
www.cdli.ca /CITE/solar_nebula.htm   (278 words)

  
 Messier Object 42
The Orion Nebula Messier 42 (M42, NGC 1976) is the brightest starforming, and the brightest diffuse nebula in the sky, and also one of the brightest deepsky objects at all.
The Orion Nebula was probably discovered in late 1610, when Nicholas-Claude Fabri de Peiresc (1580-1637), a French lawyer, turned his telescope to this region of the sky, and reported of a cloudy nebulosity.
As the drawings of the Orion Nebula known to him did so poorly represent Messier's impression, he created a fine drawing of this Object, in order to "help to recognize it again, provided that it is not subject to change with time" (as Messier states in the introduction to his catalog).
www.seds.org /messier/m/m042.html   (2083 words)

  
 Nebula - Memory Alpha, the Star Trek Wiki
A nebula is an interstellar cloud of matter, usually gases (such as hydrogen) and dust.
Since sensors and other systems functioned poorly in some nebulae, they were often used by starships to strategic advantage in conflicts.
Iden eventually left the nebula on his own to "liberate" three holograms on a nearby Nuu'Bari vessel.
memory-alpha.org /en/wiki/Nebula   (220 words)

  
 Nebula
nebulae) is an interstellar cloud of dust and gas.
Originally nebula was a catch-all name for any extended astronomical object, including galaxies beyond the Milky Way (some examples of the older usage survive).
Emission nebulae are internally illuminated clouds of ionized gas.
www.xasa.com /wiki/en/wikipedia/n/ne/nebula.html   (214 words)

  
 Highbeam Encyclopedia - Search Results for nebula   (Site not responding. Last check: )
nebula NEBULA [nebula] [Latmist], in astronomy, observed manifestation of a collection of highly rarefied gas and dust in interstellar space.
Crab Nebula CRAB NEBULA [Crab Nebula] diffuse gaseous nebula in the constellation Taurus; cataloged as NGC 1952 and M1, the first object recorded in Charles Messier's catalog of nonstellar objects.
It is the remnant of a supernova that was observed in 1054 by Chinese and Arab astronomers to be as bright as
www.encyclopedia.com /articles/09081.html   (600 words)

  
 Nebulae - Zoom Astronomy
A reflection nebula is a nebula that glows as the dust in it reflects the light of nearby stars.
The Cygnus loop is a nebula, a supernova remnant in the constellation Cygnus.
The Orion Nebula is roughly 30 light-years in diameter.
www.enchantedlearning.com /subjects/astronomy/stars/nebulae.shtml   (638 words)

  
 Volume Visualization of the Orion Nebula
One of the closest is the Orion Nebula, which is 1500 light-years from Earth and measures several light-years across.
Voxels within the glowing parts of the nebula are made opaque and given a color based upon specially color-corrected Hubble imagery (color correction removes the reddening effects of dust and gas between Earth and the nebula).
The volumetric model was used to render images of the nebula as seen from the point of view of a spacecraft flying through the nebula.
vis.sdsc.edu /research/orion.html   (1182 words)

  
 Natural World/The Universe/Brightest Nebula   (Site not responding. Last check: )
The Orion Nebula (M42 (Messier 42)) is the brightest nebula in the sky, with an apparent magnitude of 4.
A nebula is a vast cloud of gas and dust.
Diffuse nebulae either emit their own light or reflect the light of nearby stars, while dark nebulae obscure the stars behind them.
www.guinnessrecords.com /content_pages/record.asp?recordid=55562   (236 words)

  
 Chandra :: Photo Album :: Orion Nebula :: More Images of Orion Nebula
The red X-ray sources are mostly young stars in Orion Nebula with little absorption by intervening gas and the blue X-ray sources are mostly young stars with larger amounts of gas absorption.
This optical image of the central region of the Orion Nebula Nebula Cluster was obtained with the Hubble Space Telescope and released in 1995.
This infrared image of the central region of the Orion Nebula Nebula Cluster was made using the infrared ISAAC instrument on the ESO Very Large Telescope (VLT) at the Paranal Observatory and is a mosaic of 81 VLT images.
chandra.harvard.edu /photo/2005/orion/more.html   (631 words)

  
 Natural World/The Universe/Nearest Nebula   (Site not responding. Last check: )
The Helix Nebula (also known as NGC 7293) is around 450 light years away from but is still the closest planetary nebula to the Earth.
All nebulae are made up of interstellar matter such as gas and grains of cosmic dust.
If the Helix Nebula was bright enough to be visible to the naked eye, it would cover an area of sky around half the size of the full Moon.
www.guinnessworldrecords.com /content_pages/record.asp?recordid=56518   (131 words)

  
 BBC - Science & Nature - Space - Nebulae Picture Gallery
The Latin word for cloud, nebula is a term used to describe cosmic gas and dust among the stars.
Emission nebulae are the most colourful of all, glowing with the energy released from the stars within them.
The NGC project is a collaboration between professional and amateur astronomers to correctly identify all nebulae and star clusters.
www.bbc.co.uk /science/space/myspace/yourgallery/nebulae.shtml   (266 words)

  
 Types of Nebulae
These nebulae are usually red because the predominant emission line of hydrogen happens to be red (other colors are produced by other atoms, but hydrogen is by far the most abundant).
Reflection nebulae are clouds of dust which are simply reflecting the light of a nearby star or stars.
Dark nebulae are clouds of dust which are simply blocking the light from whatever is behind.
astro.nineplanets.org /twn/types.html   (667 words)

  
 nebula concept from the Astronomy knowledge base
"Bright" nebulae glow with light emitted by the gas of which they are composed ("emission" nebulae) or by reflected starlight ("reflection" nebulae) or both.
dark nebula (3 kinds, 17 facts) - A relatively dense cloud of interstellar matter whose dust particles obscure the light from stars beyond it and give the cloud the appearance of a region devoid of stars.
The most famous H II region is the Orion Nebula., Region of ionized hydrogen in interstellar space.
www.site.uottawa.ca:4321 /astronomy/nebula.html   (399 words)

  
 APOD Search Results for "nebula"
The nebula is composed of material cast off by a dying sun-like star as it enters its white dwarf phase of evolution.
Buried in the complex nebulosity are the bright stars of the Trapezium in Orion's heart, the sweeping lanes of dark dust that cross the center, the pervasive red glowing hydrogen gas, and the blue tinted dust that reflects the light of newborn stars.
Planetary nebulae in general are not at all related to planets, but instead are created at the end of a sun-like star's life as its outer layers expand into space while the star's core shrinks to become a white dwarf.
antwrp.gsfc.nasa.gov /cgi-bin/apod/apod_search?nebula   (10319 words)

  
 Nebula Home Page
Nebula Support will be moving to the UW Tower in late March.
The Nebula Support team will be moving to the UW Tower in late March, along with other members of UW Technology Services.
Nebula clients are able to install software on their computers, and save work-related files to the file servers.
www.washington.edu /nebula   (1103 words)

  
 NGC 6334, The Cat's Paw Nebula
NGC 6334 is the Cat's Paw nebula in Scorpius.
It is a large area of emission nebulosity more than a half of a degree in size located about 3 degrees northwest of Lambda and Upsilon Scorpii, the stinger in the Scorpion's tail, which are also called the Cat's Eyes.
To the upper left of NGC 6334 is an area almost devoid of stars which is dark nebula B 257.
www.astropix.com /HTML/D_SUM_S/NGC6334.HTM   (147 words)

  
 The Great Orion nebula
The Orion Nebula is famous for a number of reasons.
Its brightness led to it being the first nebula ever photographed (in 1882) and its proximity (1350 light years) means that we know more about it than any other star-forming region.
The inner regions are glowing mainly in the red light of excited hydrogen, which together with some green emission from oxygen give the centre of the nebula a yellowish colour.
www.aao.gov.au /images/captions/aat019.html   (220 words)

  
 Planetary Nebula Sampler
It is estimated that there are about 10,000 planetary nebulae in our galaxy, so they are a relatively common, although short-lived phase (about 25,000 years) of the stellar life cycle.
For more information about the colors in nebulae, see this example of a PN in a globluar cluster.
NOAO is operated by the Association of Universities for Research in Astronomy (AURA), Inc. under cooperative agreement with the National Science Foundation.
www.noao.edu /jacoby   (397 words)

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