A key sensor (Faraday cup [1]) for studying the solar wind, outside of the shield, was constructed of not one but apparently four varieties of unobtainium: Tita

A key sensor (Faraday cup [1]) for studying the solar wind, outside of the shield, was constructed of not one but apparently four varieties of unobtainium: Titanium-Zirconium-Molybdenum alloy, acid-etched tungsten, sapphire crystal tubes, and niobium wiring. All together these could make a fascinating engagement ring. [1] https://en.wikipedia.org/wiki/Faraday_cup https://en.wikipedia.org/wiki/Faraday_cup