The National Space Science Center of the Chinese Academy of Sciences and the Space Studies Board of U.S. National Academies of Sciences, Engineering, and Medicine to invite applications to participate in the 9th and 10th Forums for New Leaders in Space Science. The Forums, initiated in 2014, are designed to provide opportunities for a highly select group of young space and Earth scientists to discuss their research activities in an intimate and collegial environment. The 9th and 10th Forums will be devoted to Earth observation from space and planetary science (i.e., studies of the solar system’s planets, satellites, and minor bodies) and will be held on 15-16 May 2019 (in Beijing, China) and 28-29 October 2019 (in Washington, DC).