Expedition
From the first extra planetary colony on Luna, factories and launch platforms rocketed thousands of small, cheap probes into the solar system to begin exploring its various celestial bodies up-close. Precise measurements of material composition, weight, size, and more was found for tens of thousands of different celestial bodies; as well as tons of miscellaneous research data.
Most importantly was the first ever discovery of alien life on the dwarf planet Orcus; being several strains of anaerobic bacteria-like lifeforms which live near the cryovolcanoes of Orcus and consume methane and ethane to sustain themselves.