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Today in History: Giuseppe Piazzi discovers dwarf planet Ceres

1/1/2026

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Summary

Story summary

On January 1, 1801, Italian astronomer Giuseppe Piazzi discovered the dwarf planet Ceres at the Palermo Astronomical Observatory. Initially classified as a planet, Ceres is now recognized as the largest dwarf planet in the asteroid belt between Mars and Jupiter. It is named after the Roman goddess of agriculture and fertility.

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Story summary

On January 1, 1801, Italian astronomer Giuseppe Piazzi discovered the dwarf planet Ceres at the Palermo Astronomical Observatory. Initially classified as a planet, Ceres is now recognized as the largest dwarf planet in the asteroid belt between Mars and Jupiter. It is named after the Roman goddess of agriculture and fertility.