presolarの例文

• Presolar grains are not floating around the solar system by themselves.
• To an extent, all bodies formed from the presolar nebula.
• Some presolar grains in primitive meteorites consist of hibonite.
• Hence presolar carbon and carbide grains were discovered first.
• Over billions of years, clouds of gas, molecules and presolar grains accumulate.
• They use careful chemical techniques to recover tiny presolar grains from the celestial visitor.
• As it turns out, presolar grains display wild variations in their isotopic ratios.
• Stardust is one component of cosmic dust, and is frequently called presolar grains.
• The single exception to this lies with the presolar grains found in primitive meteorites.
• This supported the idea that presolar dust grains were present in the sludge from the meteorite.
• Certain classes of meteorites ( carbonaceous chondrites ) also contain substantial amounts of presolar nanocrystalline diamond grains.
• Certain types of chondrites also contain small amounts of organic matter, including amino acids, and presolar grains.
• According to present theories, the presolar grains form from chemical isotopes ejected by exploding stars and red giant stars.
• However, unlayered graphene with only ( hk0 ) rings has been found in the core of presolar graphite onions.
• The Solar System is hypothesised to have formed from a giant rotating ball of gas and dust known as the presolar nebula.
• These isotopic signatures often fingerprint very specific astrophysical nuclear processes that took place within the parent star and prove their presolar origin.
• Presolar grains provide information " about the stars that contributed to the material from which the solar system formed . . ..
• This confirmed a 1975 prediction of the identification of supernova stardust ( SUNOCONs ), which became part of the pantheon of presolar grains.
• Other presolar grains ( AGB star grains ) provide isotopic and physical information on galactic evolution prior to the formation of the Solar System.
• The carrier of this gas is extremely fine-grained diamond dust that is older than the solar system itself, known as presolar grains.