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.
Marie met Pierre Curie, Professor and researcher at the Paris University, in 1894 when she started research for her doctoral thesis in his laboratory. They married in 1895 and had two children, Eve and Irene. In 1898, with Pierre Curie, she discovered two new elements, polonium and radium. Pierre passed away in 1906, victim of an accident. She continued research isolating polonium and radium to fully demon-strate the existence of the elements discovered through their radioactive emissions.