January 1 in Space History

4 events

1. 1801 225 years ago astronomical discovery

   Ceres discovered

   Category: Discoveries and Scientific Results › Type: Discovery

   Giuseppe Piazzi discovered Ceres, the first recognized asteroid and now classified as a dwarf planet.

   • NASA HEASARC — 1800–1899 (opens in a new tab) — Factual summary; source attribution retained.

2. 1990 36 years ago mission operations

   Voyager Interstellar Mission begins

   The Voyager program formally began its extended investigation of the outer heliosphere.

   • NASA — Voyager 1 (opens in a new tab) — Factual summary; source attribution retained.

3. 2019 7 years ago planetary flyby

   New Horizons flies past Arrokoth

   Category: Mission Operations and Milestones › Type: Flyby

   Mission: New Horizons

   New Horizons explored the Kuiper Belt object Arrokoth at close range.

   • NASA — New Horizons (opens in a new tab) — Factual summary; source attribution retained.

4. 2024 2 years ago launch

   XPoSAT — launch

   Category: Launches and Flight Tests › Type: Orbital launch

   Mission: XPoSAT

   • Space transportation

   PSLV-DL launched on the XPoSAT flight from Satish Dhawan Space Ctr, Sriharikota, Andhra Pradesh, India, pad FLP. Launch vehicle success.

   • Jonathan McDowell — General Catalog of Artificial Space Objects (opens in a new tab) — Data from GCAT (J. McDowell, planet4589.org/space/gcat), CC BY 4.0. Adapted into anniversary records. (CC BY 4.0)