from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Describing the conditions prior to the formation of the solar system, or describing the protostar that became the sun
proto- + solar (Wiktionary)
Based on the data, some scientists theorized that the protosolar system was destroyed when a subspace compression collided with the Trifid star, causing it to go supernova and eject most of its mass.