... cold material accreted into a huge icy ball. This material is likely to have been at or beyond the ‘snowline’, in a protoplanetary disk, where carbon monoxide, and other compounds such as water condense into solid ice particles; if formation begins...
... the harsh and irradiating regions surrounding protostars, it is quite possible that they would continue to survive as the protoplanetary disks around the young star systems evolved to create planets. If that is the case, then it is also likely that...
... away, the Ophiuchus cloud complex is a haven of dense protostellar cores in various stages of star formation and protoplanetary disk development; aspects which represent the earliest stages planetary system development. By combining the imaging data...
... and contain high-temperature minerals. They are among the first solids condensed from the cooling protoplanetary disk which eventually became our Solar System. Isotopic compositions of CAIs show that they underwent repeated melting...