uncrewed probe sent by NASA as part of Mariner program in 1967
via Wikipedia infobox
Launch of Mariner 5
Mariner 5 (Mariner V or Mariner Venus 1967) was a spacecraft of the Mariner program that carried a complement of experiments to probe Venus's atmosphere by radio occultation, measure the hydrogen Lyman-alpha (hard ultraviolet) spectrum, and sample the solar particles and magnetic field fluctuations above the planet. Its goals were to measure interplanetary and Venusian magnetic fields, charged particles, plasma, radio refractivity and UV emissions of the Venusian atmosphere.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).