See the Kepler data release schedule. Exoplanet Archive Kepler Resources General Documentation . Kepler Extended Mission data philosophy; How to request a Kepler number; How to request a K2 number; Search for a Kepler light curve; K2 Mission page
Radium was discovered by Marie Sklodowska-Curie and her husband Pierre Curie on 21 December 1898, in a uraninite (pitchblende) sample. While studying the mineral earlier, the Curies removed uranium from it and found that the remaining material was still radioactive.
Now, in radium â in the form of radium bromide â they had discovered a further radioactive element whose chemistry was very similar to that of group II metal barium. Metallic radium was first isolated in 1910 by Marie Curie and Andre Debierne by the electrolysis of a solution of pure radium chloride.