Period 5 element and because of its rarity, rhodium is usually alloyed with platinum or palladium and applied in high-temperature and corrosion-resistive coatings. White gold is often plated with a thin rhodium layer to improve its optical impression while sterling silver is often rhodium plated for tarnish resistance. Rhodium detectors are used in nuclear reactors to measure the neutron flux level. Palladium is a chemical element with the chemical symbol Pd and an atomic number of 46. It is a rare and lustrous silvery-white metal discovered in 1803 by William Hyde Wollaston. He named it after the asteroid Pallas, which was itself named
Stars named after people astronomical world heritage, and maintain a catalog of IAU-approved unique proper names for stars. The WGSN's first bulletin of July 2016 set out its terms of reference and naming guidelines. All approved names are included on the current List of IAU-approved Star Names, last updated on 1 June 2018. The WGSN confirmed the names Cervantes and Copernicus and has additionally approved four star names after individuals:- Apart from the few formally approved by the IAU, and leaving aside commercial attempts, stars named after individuals fall broadly into two groups. The first group are those named openly for an individual connected