4901 20200610161011.0 CTALK-2020-0117 Clette, Frédéric The new Sunspot Number: What are the key changes? 2019 2019-03-05 NASA Travel Grant 17-NUP2017-0063/ NASA Travel Grant 17-NUP2017-0063/ NASA Travel Grant 17-NUP2017-0063 STCE Solar Cycle 25 Prediction Panel, Boulder, CO, USA frederic.clette@observatoire.be Invited CTALKINVI