Definition: Giant Molecular Cloud (GMC): Massive clouds of gas in interstellar space composed primarily of hydrogen molecules (two hydrogen atoms bound together), though also containing other molecules observable by radio telescopes.
Giant Molecular Clouds (GMCs)
Vast assemblages of molecular gas with masses of 104-106 times the mass of the sun are called Giant molecular clouds (GMC).
giant molecular cloud
interstellar clouds of cold gas and dust that contain tens or hundreds of thousands of solar masses
gibbous ...
Giant Molecular Clouds (GMCs) & Absorption Nebulae
Credit: NASA and The Hubble Heritage Team (STScI/AURA)
Dark dust lanes and bright HII regions in the spiral arms of M51, the Whirlpool Galaxy.
Giant Molecular Cloud
Very large, cool clouds of dense gas in which stars form.
Giant Stars ...
Giant Molecular Cloud
A huge complex of interstellar gas and dust, consisting mostly of molecular hydrogen, that typically stretches over 150 light-years and contains 200,000 solar masses. Giant molecular clouds give birth to new stars.
Giant Molecular Cloud - An unusually large molecular cloud that may contain as much as 1 million solar masses ...
Giant molecular clouds (GMCs) contain enormous numbers of molecules. Throughout most of their volume, pressures, densities, and temperatures are extremely low - a tiny fraction of those found here on Earth.
Giant Molecular Cloud (GMC) Huge, cool clouds of dust grains, and gas, much of which is in the form of molecules. GMC's appear to be where most of the stars are formed in galaxies.
Giant Molecular Cloud: A region of dense interstellar medium that is sufficiently cold that molecules can form. They are very cold (10-20K) with relatively high densities (trillion particles per cubic meter), and huge.
- Giant Molecular Cloud (GMC) - Space and Astronomy Definition - Online Dictionary and Glossary Definition of Giant Molecular Cloud (GMC)
- Stormy Cloud of Star Birth Glows in New Spitzer Image ...
A giant molecular cloud is a large, dense gas cloud (with dust) that is cold enough for molecules to form. Thousands of giant molecular clouds exist in the disk part of our galaxy.
Light Blows Away Giant Molecular Clouds
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This cloud of gas and dust is being deleted. Likely, within a few million years, the intense light from bright stars will have boiled it away completely.
Since stars form out of giant molecular clouds, lots of stars form in a relatively short time. The end result of all this star formation is the creation of a cluster of stars called an open cluster or galactic cluster.
Molecular clouds that exceed the mass of 100,000 suns are called giant molecular clouds. Giant molecular clouds are the largest inhabitants of galaxies, reaching up to 300 light years in diameter.
You'd see things like Giant Molecular Clouds and the most massive stars that are formed (OB types). You'd also see the things around such objects like the H II regions.
Long-period comets may be perturbed from their resting place in the Oort cloud by a passing star or giant molecular cloud, or even through tidal forces generated by the bulge and disk of our Galaxy.
The largest nebulae of this type, the so-called giant molecular clouds, are more than a million times as massive as the Sun.
In addition, there are the influences of giant molecular clouds of cold hydrogen and dust massing many suns and galactic tidal forces.
Bok hypothesized that giant molecular clouds, on the order of hundreds of light-years in size, can become perturbed and form small pockets where the dust and gas are highly concentrated.
Stars are created within galaxies from a reserve of cold gas that forms into giant molecular clouds. Some galaxies have been observed to form stars at an exceptional rate, known as a starburst.
In the beginning, there is the Giant Molecular Cloud. Most of the empty space inside a galaxy actaully contains around 0.
CO Molecular-Line Studies: The discovery that much of a galaxy's interstellar medium resides in massive clouds (106-107 solar masses, giant molecular clouds or GMCs) revolutionized our view of star formation.
These comets probably were perturbed from orbits in the Oort cloud by a passing star or giant molecular cloud, or by tidal forces generated by the bulge and disk of our Galaxy.
Although they only make up about one percent of the interstellar medium, giant molecular clouds are a rather formidable thing. These dense masses of gas can reach tens of parsecs in diameter and we know them as star forming regions.
The dust plays a key role in giant molecular clouds in protecting the fragile molecules from intense interstellar ionising and dissociating radiation.
In addition to stellar perturbations where another star's Oort cloud passes through or close to the Sun's Oort cloud, are the influences of giant molecular clouds and tidal forces. A giant molecular-cloud is by far more massive than the Sun.
There indeed is some speculation that the compression of Giant Molecular Clouds by supernova explosions is instrumental in causing these clouds to collapse and form stars and solar systems (such as our own).
The Rosette Nebula is a large, circular H II region located near one end of a giant molecular cloud in the Monoceros region of the Milky Way.
The Solar System consists of the Sun and the astronomical objects bound to it by gravity, all of which formed from the collapse of a giant molecular cloud approximately 4.6 billion years ago.
This appears to be created by the winds from the stars in the star forming region known as the Scorpius-Centaurus association where giant molecular clouds sit about at about 100 Kelvin and 1,000 atoms per cubic centimeter.
(Interlude 6-2 ) At the same time, the tidal gravitational field of the Milky Way Galaxy slowly strips outlying stars from the cluster. Occasional distant encounters with giant molecular clouds also tend to remove cluster stars; ...
 See also: Molecular Cloud, Giant, Light, Star, Solar
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