Nebula
Related Category: Astronomy: General
(nb´yl) [Lat.,=mist], in astronomy, observed manifestation of a collection of highly rarefied gas and dust in interstellar space.
Nebular Theory
The nebular theory offers an explanation of this most remarkable uniformity. Laplace supposed the existence of a primeval nebula which extended so far out as to fill all the space at present occupied by the planets.
Nebula
A nebula is an interstellar cloud of gas and dust. The properties of nebulae vary enormously and depend on their composition as well as the environment in which they are situated.
Nebula
The Triangulum Emission Nebula NGC 604 lies in a spiral arm of Galaxy M33, 2.7 million light-years from Earth. This nebula is a region in which stars are forming.
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A new look at the Eagle Nebula by Hubble. Credit: ESA/Hubble & NASA ...
Nebula Hopping in the Eastern Sky
Gravity has finally won the battle. The weakest of nature's forces, gravity waits for perhaps billions of years for the fuel to run out in stars.
nebula
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Nebulae From NASA
Nebulae take the form of magnificent celestial works of art.
Their names are a form of scrying or divination,
laced with metaphoric, mystical, and mythological content.
The Crab Nebula is a supernova remnant and pulsar wind nebula in the constellation of Taurus .
Nebula :
Nebula (Latin: "mist") is a term formerly used in astronomy to denote any object situated beyond the solar system that is seen as a bright or dark area, in contrast to the pointlike images of stars.
Nebulae and Stellar Birth
Overview
Stellar nurseries are made of clouds of dust and gas called nebulae (singular is nebula).
A nebula consists of clouds of interstellar dust particles and gases. These clouds are the birthplace of new stars.
1 Nebula classification
2 Nebula types
3 See also
4 External link
Edit Nebula classification ...
ORION NEBULA
The Orion Nebula (M42 and M43) is a huge, nearby, turbulent gas cloud (mostly hydrogen) that is lit up by bright, young hot stars (including the asterism called Trapezium) that are developing within the nebula.
ORION NEBULA
The (M42 and M43) is a huge, nearby, turbulent gas cloud (mostly hydrogen) that is lit up by bright, young hot stars (including the called ) that are developing within the nebula.
A generic term for a fuzzy, diffuse astronomical object. Astronomers have observed four different types of nebulae: H II regions, reflection nebulae, planetary nebulae, and supernova remnants.
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NEBULAE & STAR CLUSTERS
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The nebulae, which can be over a light year across, are ionized and made to glow by ultraviolet radiation from their central stars, which are the stripped-down old nuclear-burning cores of stars that were once much like the Sun.
Nebulae may be described as matter bounded or radiation bounded. According to this rather counterintuitive terminology, in the former case, there is not enough matter in the nebula to absorb all the UV photons emitted by the star, ...
A nebula produced when a star expels its outer layers. Many planetary nebula are spherical, and appear to be nearly perfect circles to observers since the largest occurs for the portions of the sphere tangent to the line of sight.
Gaseous Nebula
A glowing cloud of gas in interstellar space. The cloud of gas may be either an emission nebula, which absorbs ultraviolet light from nearby stars and re-radiates visible light, or a reflection nebula, ...
The Crab Nebula in the Far Ultraviolet
The Crab Nebula in the ultraviolet (photographed by the Ultraviolet Imaging Telescope (UIT), part of the Astro shuttle package). The image of the Crab in far UV appeared in Hennessy et al. 1992, ApJL, 395, L13.
The Crab Nebula, located 6,500 light years away in the constellation Taurus, is the remnant of a stellar explosion that occurred in 1054.
planetary nebula - Space and Astronomy Definition - Online Dictionary and G...
shock wave - Space and Astronomy Definition - Online Dictionary and Glossar...
Fast Fourier Transformation (FFT) - Space and Astronomy Definition - Online...
M27 is a planetary nebula some 1200 light years away from the Earth. Planetary nebulae are named because early astronomers saw them as round objects.
The term planetary nebula is a misnomer; dying stars create these cocoons when they lose outer layers of gas. The process has nothing to do with planet formation, which is predicted to happen early in a star's life.
HUBBLE FINDS AN HOURGLASS NEBULA AROUND A DYING STAR
This is an image of MyCn18, a young planetary nebula located about 8,000 light-years away, taken with the Wide Field and Planetary Camera 2 (WFPC2) aboard NASA's Hubble Space Telescope (HST).
In between these horn stars you can locate the famous Crab Nebula, a supernova remnant of a once mighty star that blew itself to smithereens on July 4, 1054.
Click on the name of a nebula above for an image and more info.
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Nebula
(a) The term "nebula" was previously applied to all kinds of hazy patches in the sky, many of which are now recognized to be clusters or galaxies. (The plural is nebulae) ...
Nebulae - The Dust of Stars
The Orion Nebula
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NASA
Why would we call nebulae stardust? Because the gas of which they are composed both creates and is created by stars.
NEBULAR CONTRACTION
One of the earliest heliocentric models of solar system formation is termed the nebular theory, which may be traced back to the seventeenth-century French philosopher René Descartes.
NEBULA
NEBULA, in astronomy, a localized conglomerate of the gaseous and finely divided dust particles that are spread throughout interstellar space.
Nebula vdB142 in IC1396 Complex in Cepheus
This beautiful nebula is located in IC1396 complex in Cepheus.
nebula
a cloud of interstellar gas and dust; some nebulae represent stellar nurseries, others represent stellar graveyards
neutrino ...
Nebulae
In most region of space, the particle density is about 1 atom per cubic centimeter, however, in some region of space, the density is over 1000 atom/cm3.
NEBULA
A low density cloud of gas and dust in which a star is born.
O
OORT CLOUD
A huge cloud which is thought to surround our solar system and reach over halfway to the nearest star. Comets originate in the Oort Cloud.
Nebula A cloud of interstellar gas and dust. See also emission, reflection and planetary nebula.
Node One of two points at which an orbit passes through a reference plane (usually the ecliptic).
Nebula: A term used by optical astronomers to denote any object that resembles a cloud, either bright or dark, and is not stellar in appearance.
nebula
A collection of interstellar dust and gas which is illuminated by nearby or imbedded stars, or in the case of a dark nebula, blocks the light from background stars.
nebular cloud
A gaseous cloud of interstellar material.
Nebula, Dark. A dense cloud of gas and dust in space that appears as a dark silhouette against a brighter background.
Nebula
a cloud of dust and gas in space, usually illuminated by one or more stars. Nebulae represent the raw material the stars are made of.
nebula: A cloud of gas and dust in space.
nebular hypothesis: The proposal that the solar system formed from a rotating cloud of gas.
neutrino: A neutral, massless atomic particle that travels at or nearly at the speed of light.
Ring Nebula
Taken by Al Kelly with a CB245 CCD camera.
Lydia:
What did your parents think of you pursuing astronomy?
Dark Nebula
A relatively dense (up to 104 particles per cm3) 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. [H76]
Darwin Ellipsoids ...
Crab nebula --a cloud-like nebula observed in the Crab constellation, the remnant of a supernova explosion observed in China in 1054. It contains a very rapidly rotating (and hence, young) pulsar, which is probably the remnant of the supernova.
Dark Nebula
A nebula consisting of dust and gas blocking our view of more distant stars.
Decameter Radiation ...
Dark Nebula - A dense, interstellar cloud containing enough gas and dust to block the light of background stars. The dimming of background stars gives the appearance of a region with no stars ...
Orion Nebula
The Orion Nebula is also known as M42. The M refers to Charles Messier an 18th century French astronomer and comet hunter. He compiled a list of deep sky fuzzy looking objects so they would not be mistaken for comets.
Solar nebula: The immense cloud of gas and particles of floating cosmic dust from which our Solar System (Sun and planets) condensed 4.6 billion years ago.
[edit] Nebulae
In the early days of telescopic astronomy, the word nebula was used to describe any fuzzy patch of light that didn't look like a star.
In the Nebular Hypothesis, a cloud of gas and dust collapsed by gravity begins to spin faster because of angular momentum conservation ...
Nebulae M 42 (Large Orion Nebula), M 43 (De Mairan Nebula)
Binaries beta Ori, delta Ori, zeta Ori, eta Ori, theta1 Ori, theta2 Ori, iota Ori, lambda Ori, Struve 750, Struve 747
Multiple star cluster sigma Ori, Struve 761
Star cluster NGC 1981 ...
nebula: Latin for "cloud." Bright nebulas are great clouds of glowing gas lit up by stars inside or nearby. Dark nebulas are not lit up and are visible only because they block the light of stars behind them.
Nebulae are simply clouds of interstellar gas and dust and appear either as dark regions blotting out background stars - the so-called dark or absorption nebulae or as brighter clouds of gas that emit or reflect light.
Nebula
A cloud of dust and gas in space. Some are luminous and some nebulae are dark.
Nova ...
Nebula
(plural=nebulae) A mass of gas and dust in space. This image is the Crab nebula.
Neutral Having no electric charge.
Neutron The part of an atom that has no charge. It is part of the nucleus.
nebula General term used for any "fuzzy" patch on the sky, either light or dark; a cloud of interstellar gas and dust.
nebula - (n.)
rarefied cloud of gas or dust observed in interstellar space.
nebular hypothesis - (n.) ...
Nebula: An interstellar cloud of dust and gas. Often solar systems form when something causes these clouds to coalesce. These can be formed by the death of a star.
 See also: Sun, Earth, Star, Solar, Light
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