A small part of the emission nebula NGC 6357. It glows with the characteristic red of an H II region.[1]
An Interstellar Cloud is generally an accumulation of gas, plasma, and dust in our and other galaxies. Put differently, an interstellar cloud is a denser-than-average region of the interstellar medium, the matter and radiation that exists in the space between the star systems in a galaxy. Depending on the density, size, and temperature of a given cloud, its hydrogen can be neutral, making an H I region; ionized, or plasma making it an H II region; or molecular, which are referred to simply as molecular clouds, or sometime dense clouds. Neutral and ionized clouds are sometimes also called diffuse clouds. An interstellar cloud is formed by the gas and dust particles from a red giant in its later life.
^"Carved by Massive Stars". ESO Picture of the Week. European Southern Observatory. Retrieved 13 September 2013.
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An InterstellarCloud is generally an accumulation of gas, plasma, and dust in our and other galaxies. Put differently, an interstellarcloud is a denser-than-average...
A molecular cloud, sometimes called a stellar nursery (if star formation is occurring within), is a type of interstellarcloud, the density and size of...
In astronomy, the interstellar medium (ISM) is the matter and radiation that exists in the space between the star systems in a galaxy. This matter includes...
al. in a diffuse interstellarcloud in the sightline Cygnus OB2#12. In 2006 Oka announced that H+ 3 was ubiquitous in interstellar medium, and that the...
boundary of the Solar System to interstellar space. The outermost region of the Solar System is the theorized Oort cloud, the source for long-period comets...
A dark nebula or absorption nebula is a type of interstellarcloud, particularly molecular clouds, that is so dense that it obscures the visible wavelengths...
in the Milky Way (0.5 atoms/cm3), and one sixth that of the Local InterstellarCloud (0.3 atoms/cm3).[dubious – discuss] The exceptionally sparse gas of...
The Rho Ophiuchi cloud complex is a complex of interstellarclouds with different nebulae, particularly a dark nebula which is centered 1° south of the...
the Local InterstellarCloud, although it is not clear if it is embedded in the Local InterstellarCloud or if it lies just outside the cloud's edge. Multiple...
physics terms, it is the cavity formed by the Sun in the surrounding interstellar medium. The "bubble" of the heliosphere is continuously "inflated" by...
astronomical location: intergalactic dust, interstellar dust, interplanetary dust (as in the zodiacal cloud), and circumplanetary dust (as in a planetary...
planet formation is the nebular hypothesis, which posits that an interstellarcloud collapses out of a nebula to create a young protostar orbited by a...
formation is the process by which dense regions within molecular clouds in interstellar space, sometimes referred to as "stellar nurseries" or "star-forming...
of the richest sources for detecting interstellar molecules is Sagittarius B2 (Sgr B2), a giant molecular cloud near the centre of the Milky Way. About...
An interstellar object is an astronomical object (such as an asteroid, a comet, or a rogue planet, but not a star or stellar remnant) in interstellar space...
depending on the local density of the interstellar medium. The Local Bubble contains dozens of warm interstellarclouds with temperatures of up to 7,000 K...
An interstellar probe is a space probe that has left—or is expected to leave—the Solar System and enter interstellar space, which is typically defined...
planet formation is the nebular hypothesis, which posits that an interstellarcloud collapses out of a nebula to create a young protostar orbited by a...
program Interstellar probe List of artificial objects leaving the Solar System List of missions to the outer planets Local InterstellarCloud Space exploration...
order to study gas phase interstellar chemistry, it is convenient to distinguish two types of interstellarclouds: diffuse clouds, with T=30-100 K, and n=10–1000 cm−3...
extraterrestrial cirrus clouds are made of ammonia or methane ice, much like water ice in cirrus on Earth. Some interstellarclouds, made of grains of dust...
in high school forensics competitions H I region, in astronomy, an interstellarcloud composed of neutral atomic hydrogen H&I (disambiguation) High (disambiguation)...
spherical outer Oort cloud enclosing the entire Solar System. Both regions lie well beyond the heliosphere and are in interstellar space. The innermost...
subgroup Milky Way Orion–Cygnus Arm Gould Belt Local Bubble Local InterstellarCloud – immediate galactic neighborhood of the Solar System. Alpha Centauri...
chemistry in the interstellar medium. Its action is predominantly focused in grain-surface chemistry on dust grains in interstellarclouds,. Reactions involving...
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