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- Interstellar_ice abstract "Interstellar ice consists of grains of volatiles in the ice phase that form in the interstellar medium. Ice and dust grains form the primary material out of which the Solar System was formed. Grains of ice are found in the dense regions of molecular clouds, where new stars are formed. Temperatures in these regions can be as low as 10 K, allowing molecules that collide with grains to form an icy mantle. Thereafter, atoms undergo thermal motion across the surface, eventually forming bonds with other atoms. This results in the formation of water and methanol. Indeed, the ices are dominated by water and methanol, as well as ammonia, carbon monoxide and carbon dioxide. Frozen formaldehyde and molecular hydrogen may also be present. Found in lower abundances are nitriles, ketones, esters and carbonyl sulfide. The mantles of interstellar ice grains are generally amorphous, only becoming crystalline in the presence of a star.The composition of interstellar ice can be determined through their infrared spectrum. As starlight passes through a molecular cloud containing ice, molecules in the cloud absorb energy. This adsorption occurs at the characteristic frequencies of vibration of the gas and dust. Ice features in the cloud are relatively prominently in this spectra, and the composition of the ice can be determined by comparison with samples of ice materials on Earth. In the sites directly observable from Earth, around 60–70% of the interstellar ice consists of water, which displays a strong emission at 3.05 μm from stretching of the O–H bond.In September 2012, NASA scientists reported that polycyclic aromatic hydrocarbons (PAHs), subjected to interstellar medium (ISM) conditions, are transformed, through hydrogenation, oxygenation and hydroxylation, to more complex organics - "a step along the path toward amino acids and nucleotides, the raw materials of proteins and DNA, respectively". Further, as a result of these transformations, the PAHs lose their spectroscopic signature which could be one of the reasons "for the lack of PAH detection in interstellar ice grains, particularly the outer regions of cold, dense clouds or the upper molecular layers of protoplanetary disks."".
- Interstellar_ice wikiPageID "30422155".
- Interstellar_ice wikiPageLength "6480".
- Interstellar_ice wikiPageOutDegree "44".
- Interstellar_ice wikiPageRevisionID "641106171".
- Interstellar_ice wikiPageWikiLink Amino_acid.
- Interstellar_ice wikiPageWikiLink Amino_acids.
- Interstellar_ice wikiPageWikiLink Ammonia.
- Interstellar_ice wikiPageWikiLink Carbon_dioxide.
- Interstellar_ice wikiPageWikiLink Carbon_monoxide.
- Interstellar_ice wikiPageWikiLink Carbonyl_sulfide.
- Interstellar_ice wikiPageWikiLink Category:Astrochemistry.
- Interstellar_ice wikiPageWikiLink Category:Interstellar_media.
- Interstellar_ice wikiPageWikiLink Category:Water_ice.
- Interstellar_ice wikiPageWikiLink Cosmic_dust.
- Interstellar_ice wikiPageWikiLink DLR_Institute_for_Planetary_Research.
- Interstellar_ice wikiPageWikiLink DNA.
- Interstellar_ice wikiPageWikiLink Ester.
- Interstellar_ice wikiPageWikiLink Formaldehyde.
- Interstellar_ice wikiPageWikiLink German_Aerospace_Center.
- Interstellar_ice wikiPageWikiLink Heavy_water.
- Interstellar_ice wikiPageWikiLink Hydrogen.
- Interstellar_ice wikiPageWikiLink Hydrogenation.
- Interstellar_ice wikiPageWikiLink Hydroxylation.
- Interstellar_ice wikiPageWikiLink Ice.
- Interstellar_ice wikiPageWikiLink Infrared.
- Interstellar_ice wikiPageWikiLink Interstellar_medium.
- Interstellar_ice wikiPageWikiLink Ketone.
- Interstellar_ice wikiPageWikiLink MUPUS.
- Interstellar_ice wikiPageWikiLink Meteorite.
- Interstellar_ice wikiPageWikiLink Methanol.
- Interstellar_ice wikiPageWikiLink Molecular_cloud.
- Interstellar_ice wikiPageWikiLink Molecular_hydrogen.
- Interstellar_ice wikiPageWikiLink NASA.
- Interstellar_ice wikiPageWikiLink Nitrile.
- Interstellar_ice wikiPageWikiLink Nucleotide.
- Interstellar_ice wikiPageWikiLink Nucleotides.
- Interstellar_ice wikiPageWikiLink Organic_compound.
- Interstellar_ice wikiPageWikiLink Oxygenate.
- Interstellar_ice wikiPageWikiLink Philae_(spacecraft).
- Interstellar_ice wikiPageWikiLink Polycyclic_aromatic_hydrocarbon.
- Interstellar_ice wikiPageWikiLink Polycyclic_aromatic_hydrocarbons.
- Interstellar_ice wikiPageWikiLink Protein.
- Interstellar_ice wikiPageWikiLink Proteins.
- Interstellar_ice wikiPageWikiLink Protoplanetary_disk.
- Interstellar_ice wikiPageWikiLink Protoplanetary_disks.
- Interstellar_ice wikiPageWikiLink Saturn.
- Interstellar_ice wikiPageWikiLink Science_(journal).
- Interstellar_ice wikiPageWikiLink Solar_System.
- Interstellar_ice wikiPageWikiLink Solar_system.
- Interstellar_ice wikiPageWikiLink Spectroscopy.
- Interstellar_ice wikiPageWikiLink Spectrum.
- Interstellar_ice wikiPageWikiLink Tilman_Spohn.
- Interstellar_ice wikiPageWikiLink Volatiles.
- Interstellar_ice wikiPageWikiLinkText "Interstellar ice".
- Interstellar_ice wikiPageWikiLinkText "interstellar ice".
- Interstellar_ice hasPhotoCollection Interstellar_ice.
- Interstellar_ice wikiPageUsesTemplate Template:Reflist.
- Interstellar_ice subject Category:Astrochemistry.
- Interstellar_ice subject Category:Interstellar_media.
- Interstellar_ice subject Category:Water_ice.
- Interstellar_ice type Plasma.
- Interstellar_ice type Sub-discipline.
- Interstellar_ice comment "Interstellar ice consists of grains of volatiles in the ice phase that form in the interstellar medium. Ice and dust grains form the primary material out of which the Solar System was formed. Grains of ice are found in the dense regions of molecular clouds, where new stars are formed. Temperatures in these regions can be as low as 10 K, allowing molecules that collide with grains to form an icy mantle.".
- Interstellar_ice label "Interstellar ice".
- Interstellar_ice sameAs m.0g5qrfg.
- Interstellar_ice sameAs Q17058538.
- Interstellar_ice sameAs Q17058538.
- Interstellar_ice wasDerivedFrom Interstellar_ice?oldid=641106171.
- Interstellar_ice isPrimaryTopicOf Interstellar_ice.