Take home message. The origin of highly volatile compounds (made of H, C, N, and noble gases) could be interstellar and/or synthesised within the protosolar nebula through ion-molecule exchange and/or interactions between solar/interstellar photons and the gas.
•Left: In the inner-most regions of the disk, water ice could not exist. Chondrules are ≤1 mm diameter spherical assemblages of refractory silicates formed during high enthalpy events of debated origin. They are generally devoid of volatile elements although some of them can incorporate noble gases (e.g., the subsolar component of enstatite chondrites) by undocumented processes, which are...
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